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Online Dictionary Of Invertebrate Zoology: P, Mary Ann Basinger Maggenti, Armand R. Maggenti, Scott L. Gardner

Armand R. Maggenti Online Dictionary of Invertebrate Zoology

P-1 pachynema pachyodont pachytene paedogenesis paedomorphosis paedoparthenogenesis pagina pagiopodous palate palette palidium paliform palingenesis palintrope palisade pallial palliobranchial palliolum palliopedal pallioperitoneal pallium palmaria palmars Palmen's palmula palpation palpifer palpiger palpimacula palpus paludicole palule palus pandemic panduriform Pangaea pangamy pangenesis pan¬mictic panmixia panoistic panthalassic pantherine pantropical panzootic papilioform papilla pappus papula papulous parcidentate parecium parenchyma parenchymella parenchymula paria paries parietes parieto-basilar parivincular parocciput paronychium parsimony parthenapogamy parthenita parthenogenesis parthenote partite parturition paruterine parva parviconoid pastinum patabionts patagia patella pathogen pathogenesis pathognomonic pathology patocoles patronymic paturon paucispiral paunch Paurometabola Pauropoda paurostyle Pavan's Pawlowsky's paxilla Pearman's pecilonymy pecten pectunculate pectus pedalium pedamina peddler …

Online Dictionary Of Invertebrate Zoology: O, Mary Ann Basinger Maggenti, Armand R. Maggenti, Scott L. Gardner

Armand R. Maggenti Online Dictionary of Invertebrate Zoology

obconical obcordate obese obimbricate obsite objective synonym oblanceolate oblate obligate facultative obligate parasite facultative parasite obligate symbiont facultative symbiont oblique oblique muscles oblique vein obliterate oblong oblong plates oblongum obovate obpyriform obscure obsite obimbricate obsolescence obsolete obtect obtected obtect pupa exarate pupa obturaculum obturator obtuse acute obtusilingues acutilin¬gues obumbrate obverse obverse side of colony obvolvent occasional species occipital occipital arch occipital carina occipital cilia ocular seta occipital condyles occipital foramen foramen magnum occipital ganglion occipitalia occipital margin occipital notch occipital suture occipital tentacle cirrus occiput occipital occludent margin occludent teeth occlusion plate occlusor occult oceanic zone ocellara ocellus ocellar basin …

Online Dictionary Of Invertebrate Zoology: H, Mary Ann Basinger Maggenti, Armand R. Maggenti, Scott L. Gardner

Armand R. Maggenti Online Dictionary of Invertebrate Zoology

habitat habitude habroderes hackled haem haematodocha haemocoele haemocoelous haemocyte haemolymph haemolysis hae¬mopoietic haemostatic haemoxanthine haft hair haliotoid Haller's halmatometamorphosis halocline halophile halter halteres hamabiosis hamate hamatype hami hamiform hammock hampe hamula hamular hamulohalterae hamulus hamus Hancock's hapaloderes haplobiont haplo-diploidy haploid haplometrosis haplometrotic haploneme haploneural haplont haplophase haplosis haptolachus haptomeri haptomerum haptor Hardy-Weinberg harmonic harmosis harpago harpagones harpes harpoon hastate hastisetae hatching haustellate haustellum haustrulum Hautkorper Hayes' H-band head head-fans heart heautotype hectocotylus heel height heli helical helices helicocone heliophil heliophilic heliophilous heliophobic heliotaxis heliotropism helix helmet helminth helminthiasis helminthic Helminthology helocerous helotism helus hem hemal hemapoiesis hematacyte hematal hematocyte hematodocha …

Online Dictionary Of Invertebrate Zoology: U V, Mary Ann Basinger Maggenti, Armand R. Maggenti, Scott L. Gardner

Armand R. Maggenti Online Dictionary of Invertebrate Zoology

uliginose, uliginous ultradextral ultrasinistral ultrasonic ultrastructure umbel umbilical suture umbilicus umbilicate umbo umbones umbos beak umbonal umbonal angle umbonal cavity umbonal depression umbonal fold umbonal pole umbonal reflection umbonal region umbonal spine umbone umbo umboniform rotelliform umbonuloid umbo-veliger umbraculate umbraculiferous umbrella exumbrella subumbrella umbrella organ sensillum campaniformium unarmed unarticulate uncate unci uncus unciform uncinal plate radula uncinal seta uncinate uncinate mastax uncini uncinus uncus unci undate underbridge undifferentiated undose undulate ungual unguiculus unguiculi unguiculate unguis unguifer unguiferate unguiflexor unguiform unguis ungues ungual uguiculus homodactyl unguitractor unguitractor tendon ungula unguis uniauriculate unibranchiate unicameral unicapsular unicarinate unicellular uniciliate unicolonial unicolorate unicornous unicuspid …

Online Dictionary Of Invertebrate Zoology: Q R, Mary Ann Basinger Maggenti, Armand R. Maggenti, Scott L. Gardner

Armand R. Maggenti Online Dictionary of Invertebrate Zoology

Q-technique quacking quadrangle quadrat quadrate plates quadricapsular quadricolumella columella quadridentate quadrifid quadrilateral quadrimaculate quadripartite quadripinnate quadriprostatic quadriradiate quadrithecal quadrivalve quartet tetrad quasisocial queen queen control queen substance Quenstedt muscles quick muscle phasic muscle quiescence quiescent quincunx xes quincuncial quinone biochrome cochineal quinones quinquedentate quinquefarious quinquelocular race racemose racemose glands rachidian rhacidian rachiform rachiglossate rhachiglossate rachis rachides rachises radial radial radial apophysis radial cell radial gashes radial growth radial lirae carapace costae radial masses radial-medial cross vein radial muscles radial plates radial processes radial ribs radial sector radial skeleton radial symmmetry bilateral symmetry radial vein radianal plate radiate radiate radiate veins …

Online Dictionary Of Invertebrate Zoology: S, Mary Ann Basinger Maggenti, Armand R. Maggenti, Scott L. Gardner

Armand R. Maggenti Online Dictionary of Invertebrate Zoology

sabulose sabulous sac saccate saccharobiose sacciform saccule saccus sacoglossa saddle Saefftigen's sagittae sagittocysts saliva salivarium salivary saltation Saltatoria saltatory saltigrade sanguinivorous sanidasters sapphirine saprobe saprobiont saprobiotic saprophagous saprophyte saprozite saprozoic saprozoite sarcobelum sarcode sarcolemma sarcolysis sarcomere sarcomeric sarcophagous sarcoplasm sarcoplasmic sarcosomes sarcostyle sarcotheca sarothrum saxicavous saxicolous scabellum scabrous scalariform scalaroid scalids scalpellum scalpriform scansorial scape scaphe scaphiform scaphium scaphocerite scaphognathite scaphoid Scaphopoda scapula scapus scarabaeiform scarabaeoid scarified scariose scatophagous scavenger scent sceptrules schemochrome schistosomula schizeckenosy schizocele schizochroal schizocoel schizodont schizogamy schizogenesis schizolophe schizopeltid schizopod schizorhyses Schmidt's Schwann scissorial scissure sclerification sclerite scleroblasts sclerocyte sclerophagous sclerosepta sclerotic scoleces scolecid scoleciform scolecoid …

Online Dictionary Of Invertebrate Zoology: T, Mary Ann Basinger Maggenti, Armand R. Maggenti, Scott L. Gardner

Armand R. Maggenti Online Dictionary of Invertebrate Zoology

tabula tabular tachyauxesis tachyblastic tachygen tachygenesis tachytelic tactic tactile tactoreceptors taenia taeniate taenidium taenioglossate tagma tagmata tagmosis tail tailfan Takakura's talon talus tandem tangent tangoreceptor tanylobous tapetal tapetum tapinoma-odor Tardigrada tardigrades tarsal tarsation tarsite tarsomere tarsungulus tarsus taste tautonomy tautonym taxa taxes taxis taxis taxodont taxometrics taxon taxonomic taxonomist taxonomy tectiform tectostracum tectum teeth teges tegillum tegmen tegmentum tegula tegular tegulum tegumen tegument tegumentary tela telaform telamon telegonic teleiochrysalis telenchium teleoconch teleodont teleology teleotrocha telepod telescope telescopic teletrophic telioderma teliophan telmophage telocentric telodendria telofemur telogonic telolecithal telomitic telophase telophragma telopod telopodite telorhabdions telosonic telostome telosynapsis telosyndesis telotarsus telotaxis telotroch telson …

Online Dictionary Of Invertebrate Zoology: W X Y Z, Mary Ann Basinger Maggenti, Armand R. Maggenti, Scott L. Gardner

Armand R. Maggenti Online Dictionary of Invertebrate Zoology

Wagener's larva waggle dance walking leg pereopod wall warm-blooded homoiothermal warning coloration sematic aposematic pseudaposematic wart verruca tubercle water pore hydropore Waterston's organ water vascular system wax wax gland wax layer wax-plate wax scale web weighting Weismann's ring ring gland wheel organ white body Hensen's gland white cuticle yellow cuticle wholemount whorl width wild type wing ala winter egg summer egg With's organs workers worker jelly xanthic xanthophyll xanthopterin xanthopterine X-chromosomes xenagones xenic axenic polyxenic synxenic trix¬enic xenobiosis xenoecic xenogamy cross-fertilization xenogenesis heterogenesis xenomone allelochemic xenomorphism xenoparasite xerarch succession xeric xerophilous xerophobous xerosere lithosere hydrosere xerothermic fauna xiphidiocercaria microcotylate cer¬caria …

Cheloniidae (Marine Turtle) Nest Predation, John Woolard, Richard M. Engeman, Henry T. Smith, John Griner

United States Department of Agriculture Wildlife Services: Staff Publications

On 19 June 2003 at 0217 h, an opossum (Didelphis virginiana) was observed for 10 min while digging into a marine turtle nest and eating 4 eggs on the beach at St. Lucie Inlet Preserve State Park (SLIPSP) on Jupiter Island, Florida. The predation event was observed using night vision equipment as part of nightly patrols to protect turtle nests from raccoon (Procyon lotor) and armadillo (Dasypus noverncinctus) predation during the nesting season. After verification of an ongoing predation event, the opossum was euthanized and removed. Prior to implementing predator removal on this beach, …

Effects Of Fire Ants (Hymenoptera: Formicidae) On Hatching Turtles And Prevalence Of Fire Ants On Sea Turtle Nesting Beaches In Florida, Craig R. Allen, Elizabeth A. Forys, Kenneth G. Rice, Daniel P. Wojcik

Nebraska Cooperative Fish and Wildlife Research Unit: Staff Publications

Red imported fire ants (Solenopsis invicta Buren) have increasingly been observed in loggerhead (Caretta caretta L.) and green (Chelonia mydas L.) sea turtle nests in Florida, and in the nests of freshwater turtles. They may be attracted to the disturbance, mucous and moisture associated with turtle nesting and establish foraging tunnels into turtle nests shortly after egg-laying, thus increasing the vulnerability of hatchlings to fire ant predation. We conducted experiments on a freshwater turtle (Pseudemys nelsoni Carr) to determine the potential impacts of S. invicta on turtle hatchlings. Over 70% of hatchlings were killed by …

Syncoelium Vermilionensis Sp. N., (Hemiuroidea: Syncoeliidae) And New Records For Members Of Azygiidae, Ptychogonimidae, And Syncoeliidae Parasitizing Elasmobranchs In The Gulf Of California, Stephen S. Curran, Robin M. Overstreet

Harold W. Manter Laboratory of Parasitology: Faculty Publications

During July-September 1993 and May 1996, a survey of the metazoan parasites of 817 elasmobranchs from the Gulf of California, representing 42 species, was conducted at 14 sites along the western portion of the Gulf of California. Elasmobranchs were obtained from local commercial fishers. In this paper, we report all digeneans collected during the survey, excluding the gorgoderids, which will be presented in a subsequent paper. Four species from three hemiuroid families were collected, none of which was known previously from the Gulf of California. Syncoelium vermilionensis sp. n. (Syncoeliidae), a species that differs most notably from its congeners by …

Metazoan Parasites And Other Symbionts Of Cetaceans In The Caribbean, Antonio A. Mignucci-Giannoni, Eric P. Hoberg, Doug Siegel-Causey, Ernest H. Williams Jr.

Harold W. Manter Laboratory of Parasitology: Faculty Publications

The parasite fauna in cetaceans from Puerto Rico, the Virgin Islands, and the larger Caribbean region is poorly known. We provide the first records for parasite biodiversity among a diverse assemblage of cetaceans from the Caribbean Sea. Internal and external parasites and commensals were collected from stranded whales and dolphins salvaged in Puerto Rico, the United States and British Virgin Islands, Jamaica, and Venezuela between 1989 and 1997. A total of 47 individuals of 16 species of whales and dolphins (15 odontocetes and one mysticete) were examined. Overall, parasites and commensals were found in 34 (72.3%) animals, representing 13 species …

Faunal Diversity Among Avian Parasite Assemblages: The Interaction Of History, Ecology, And Biogeography In Marine Systems, Eric P. Hoberg

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Systematics and parasite biodiversity provide power and predictability in broad studies of history, ecology and biogeography in marine systems. Parasitic helminths are elegant markers of contemporary and historical ecological relationships, geographic distribution and host-phylogeny. Complex life cycles of helminths are strongly correlated with intricate food-webs. Dependence on a series of intermediate, paratenic, and definitive hosts indicates that each parasite species represents an array of organisms within a community and tracks broadly and predictably across many trophic levels. Host and geographic ranges of parasites are historically constrained by genealogical and ecological associations, and these determinents interact resulting in characteristic parasite community …

Historical Biogeography And Modes Of Speciation Across High-Latitude Seas Of The Holarctic: Concepts For Host-Parasite Coevolution Among The Phocini (Phocidae) And Tetrabothriidae (Eucestoda), Eric P. Hoberg

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Species of Anophryocephalus are host-specific parasites of pinnipeds in the Holarctic. Phylogenetic analysis of 7 species postulates A. anophrys as the basal taxon and A. inuitorum as basal to A. skrjabini; A. arcticensis is basal to A. nunivakensis and A. eumetopii + A. ochotensis (single tree; consistency index = 74.4%; homoplasy slope ratio = 36.45%). Evaluation of host and geographic distributions postulates ringed seals of the Atlantic-Arctic as ancestral hosts, and the Arctic basin as a paraphyletic area with respect to the North Pacific. Cospeciation within this assemblage was dependent on intense isolation of small effective populations of definitive hosts …

Anophryocephalus Inuitorum Sp. Nov. And A. Arcticensis Sp. Nov. (Eucestoda: Tetrabothriidae) In Ringed Seals (Phoca Hispida Hispida) And Harp Seals (Phoca Groenlandica) From High-Latitude Seas Of Eastern Canada And The Arctic Basin, Eric P. Hoberg, Lena N. Measures

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Anophryocephalus inuitorum sp. nov. and A. arcticensis sp. nov. are described from ringed seals (Phoca hispida hispida) in the eastern Canadian Arctic; the latter species is also reported from harp seals (Phoca groenlandica) in the Gulf of St. Lawrence. Anophryocephalus inuitorum is most similar to A. skrjabini, but can be distinguished by fewer testes (14-27) and smaller dimensions of the strobila, neck (3.0-5.9 mm long), and cirrus sac (31-70 μm long), diameter of the genital atrium (44 -68 pm), and length of the male canal (23-42 μm long). Anophyrocephulus arcticensis resembles A. nunivakensis in the …

Survey And Reconnaissance Of Sea Turtles In The Northern Gulf Of Mexico, Larry Ogren

United States Department of Commerce: Staff Publications

This is a report on the results of an aerial survey of nesting beaches conducted during the period from May 16, 1977 to August 11, 1977. The area covered included the barrier beaches and offshore islands from the Florida-Alabama state line to the Rio Grande, Texas. Additional historical information is provided in order to compare current nesting activity with previous years as well as anecdotal observations on the occurrence of sea turtles in this region.

Eimeria Halleri Sp. N. (Apicomplexa: Eimeriidae) From The Round Stingray, Urolophus Halleri (Rajiformes: Dasyatidae), Steve Upton, John Bristol, Scott Lyell Gardner, Donald W. Duszynski

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Eimeria halleri sp. n. (Apicomplexa: Eimeriidae) is described from the rectal contents ofthe round stingray, Urolophus halleri Cooper (Rajiformes: Dasyatidae) from Puerto Penasco, Mexico. Oocysts are spherical or subspherical, 16.9 x 16.8 (15.0-18.0 x 15.0-18.0) /μm, with a smooth, thin wall. Micropyle, polar granule, and oocyst residuum are absent. Sporocysts are ovoid, 11.1 x 6.8 (10.0-13.0 x 6.0-7.5) /μm and possess Stieda and substieda bodies. Sporozoites are comma-shaped, 9.9 x 3.2 (9.0-11.0 x 2.8-4.0) /μm and contain an ovoid posterior and a spherical anterior refractile body. The sporocyst residuum consists either of numerous finely granular particles scattered among the sporozoites …

Nearshore Foodwebs And The Distribution Of Acanthocephalan Parasites In Antarctic Seabirds, Eric P. Hoberg

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Field studies, in the vicinity of Palmer Station during the austral summer of 1982— 1983, yielded an extensive collection of acanthocephalans and other parasites from seabirds, fish and invertebrates. The continuing analysis of this material has resulted in the elucidation of factors that control the occurrence of Corynosoma spp. in Antarctic seabirds. Notably, the host-distribution of Corynosoma spp. suggested that these parasites were being acquired from piscine or possibly amphipod prey, generally in nearshore habitats.

Trematode Parasites Of Marine Birds In Antarctica: The Distribution Of Gymnophallus Deliciosus (Olsson 1893), Eric P. Hoberg

Harold W. Manter Laboratory of Parasitology: Faculty Publications

During continuing studies of avian helminths at Palmer Station, Antarctica (Hoberg 1983) trematodes were found as parasites only of charadriiform birds. Digeneans were not represented in extensive collections (including several thousand specimens of helminths) from spheniscids, procellariids, and phalacrocoracids.

The pattern of distribution of trematodes in marine birds in Antarctica is influenced by the availability of suitable intermediate hosts (mollusca) and the foraging behavior of potential final hosts. Littoral environments near Palmer are structurally simple and of low diversity due to ice scouring. The limpet, Nacella polaris, is the dominant intertidal invertebrate and one of the few molluscs that …

A Checklist Of Parasites Of California, Oregon, And Washington Marine And Estuarine Fishes, Milton S. Love, Mike Moser

Harold W. Manter Laboratory of Parasitology: Faculty Publications

This report is a summary of the published records of parasites found from the marine and estuarine fishes of California, Oregon, and Washington. Coverage has not been limited to the western United States, but rather includes parasite reports from throughout each fish's range. Included is a host-parasite list and parasite-host cross index.

We have produced this survey because we felt there was a need for a single source which would list all the parasites infecting marine and estuarine fish from California, Oregon, and Washington. Pertinent sources are scattered over a number of journals, covering many years. Workers find it time …

Tornadoes West Of The Divide: A Climatology, Richard P. Mcnulty

National Oceanographic and Atmospheric Administration: Technical Reports and Related Materials

A climatology of tornado occurrence west of the Continental Divide is presented. These tornadoes are a small but significant part of severe weather occurrences over the United States. Data are examined from both the spatial and temporal point of view. The influence of population and topography is highly evident.

Parasites Of California Marine And Estuarine Fish, Milton S. Love, Mike Moser

Harold W. Manter Laboratory of Parasitology: Faculty Publications

While working on the parasites of several California marine fish, it was difficult to find out which parasites had been reported from our fish. Pertinent sources were scattered over a number of journals, covering many years. We compiled this list because we felt there was a need for a single source which would give all the parasites infecting California marine fish. As "marine fish" was a somewhat vague term, we decided to use it in a broad sense and included estuarine and anadromous fish in the survey. In addition, we have included records from landlocked populations of anadromous fish, such …

Marine Leeches Of The Eastern United States And The Gulf Of Mexico With A Key To The Species, Roy T. Sawyer, Adrian R. Lawler, Robin M. Overstreet

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Unlike the Eurasian marine leeches (Johansson, 1896; Selensky, 1915; Herter, 1935; Vasileyev, 1939; Knight-Jones, 1961; Sawyer, 1970; Soós, 1965), those from North America comprise an unusually neglected group, due primarily to the bewildering taxonomy of the members. Most early descriptions were brief, ambiguous, and concerned only with superficial characters. Some of the nominal species reported from the eastern United States and Canada are unrecognizable today, thus perpetuating nomenclatural confusion.

We attempt to analyze critically the marine leeches from Newfoundland to Texas, with emphasis on those of the southern states from Virginia to Mississippi. An illustrated dichotomous key and a diagnosis …

Critical Flicker Frequency In A Harp Seal, Pagophilus Groenlandicus (Erxleben, 1777), Charles D. Bernholz

University of Nebraska-Lincoln Libraries: Faculty Publications

Critical flicker frequency (CFF) in a free-swimming harp seal (Pagophilus groenlandicus) was investigated using behavioral techniques. The resulting CFF versus intensity contour indicates a definite rod-cone break, confirming a duplex photoreceptor population whose presence had not been observed in previous morphological reports.

Bibliography Of Diseases And Parasites Of Marine Fish And Shellfish (With Emphasis On Commercially Important Species), Carl J. Sindermann

Harold W. Manter Laboratory of Parasitology: Faculty Publications

The literature on diseases and parasites of marine animals has been accumulating at an accelerating rate in recent decades, and at a seemingly geometrical rate in the past few years. Reviews of selected aspects of the subject have appeared (Cheng, 1967; Sindermann, 1966; Sindermann and Rosenfield, 1967). References listed in these papers include a significant, but still a small part, of the available literature. With the proliferation of journals in many languages throughout the world, a complete bibliography, even in a narrow area of research, is almost an impossibility. Then too, the daily appearance of new published information represents an …

Ultrasonic Shark Tag Monitoring System Technical Report, Thomas Thorson, Gordon Esterberg, James Johnson

School of Biological Sciences: Faculty Publications

Table of Contents:
Introduction
Description of System
Ultrasonic Tag
Ultrasonic Tag Monitor
Hyrdophones
Receiver-Recorder Unit
Receiver
Recorder
Batteries
Operation
Figures
Distribution List
Documentation Control Data – R & D (DD Form 1473)

Digenetic Trematodes Of Marine Fishes Of Puerto Rico, Ather H. Siddiqi, Raymond M. Cable

Harold W. Manter Laboratory of Parasitology: Library Materials

Preface

This monograph reports the major part of an investigation begun by Raymond M. Cable in 1951, when he spent one year at the College of Agriculture and Mechanic Arts, University of Puerto Rico, Mayagiiez, Puerto Rico, collecting and studying larval trematodes and the helminth parasites of shore birds and marine fishes. The work there was done under the auspices set forth in the Preface to Part 4, Volume 16, of this series; this part was facilitated especially by Virgilio Biaggi, N. T. Mattox, and Donald Erdman, who rendered invaluable assistance in the collection and identification of fishes. One trip …

Notes On Scottsbluff, Nebraska, Tornadoes, 27 June 1955, Robert G. Beebe

National Oceanographic and Atmospheric Administration: Technical Reports and Related Materials

Some general characteristics of thirteen tornadoes that occurred on the afternoon of June 27, 1955 in Scottsbluff County, Nebraska, are related. Two of these caused widespread attention due to their size and their proximity to the cities of Scottsbluff and Mitchell, Nebraska. These two were photographed extensively by residents near their paths. The experience of two men directly beneath one of the two large tornadoes is related.

Some Monogenetic Trematodes From The Galapagos Islands And The Neighboring Pacific, Frank Grose Meserve

School of Biological Sciences: Dissertations, Theses, and Student Research

Introduction

Trematodes are parasitic, unsegmented, flattened (rarely cylindrical) worms. They have ventral, anterior, posterior or median attachment organs. The sense organs are poorly developed. The mouth is terminal or ventral and subterminal. The intestine is usually forked with or without lateral branches. The animals, with few exceptions, are hermaphroditic. The ovary is usually single. They have one, two, or more testes. The development is direct with only one host in the ectoparasitic Monogenea and indirect in the Digenea which have two or more hosts. The digenetic trematodes usually parasitize vertebrates which serve as their primary hosts and invertebrates (Mollusca) which …

Some Digenetic Trematodes From Deep-Water Fish Of Tortugas, Florida, Harold W. Manter

Harold W. Manter Laboratory of Parasitology: Library Materials

Introduction (first two paragraphs)

The parasitic fauna of ocean depths is practically unknown. Although an extensive fish population occurs at all depths, very little study has yet been made on the helminths of these fish. During the summers of 1930, 1931, and 1932 excellent opportunity was offered for the collection of parasites from fish trawled from depths varying from 40 to 582 fathoms at Tortugas, Florida. A considerable number of systematic hauls by the staff and crew of the Tortugas Biological Laboratory of the Carnegie Institution of Washington yielded an abundance and considerable variety of fish, some of rare forms, …