Digital Commons Network^™

A Revision Of The Cestode Family Proteocephalidae, George Roger La Rue

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Introduction

Several years ago while studying under Professor Henry B. Ward .at the University of Nebraska the writer began an investigation of a cestode parasitic in Amblystoma tigrinum (Green). That investigation resulted in a paper (La Rue 1909) in which a number of points in the anatomy of Proteocephalids were cleared up and certain problems were -outlined for investigation at an early date. In the meantime the writer became interested in the large number of Proteocephalids which Professor Ward had secured by work in the field and by exchange. The writer had also made some collections. A preliminary study of …

Problem Des Hummelstaates, Ludwig Armbruster

An

Die Honigbienen, dieses Paradigma der Biologie, geben trotz aller "Apistik" uns noch manche Rätsel auf. So wichtige Aufschlüsse wir für eine richtige Bewertung der Bienenbiologie aus einem eingehenderen Studium der Hummeln erwarten dürfen, so lückenhaft ist - freilich relativ gesprochen - andererseits das, was wir genaueres von deren Leben und Treiben wissen.

Nachtrage Und Berichtigungen Zu Burgeff H., Kommentar Zum Katalogus Lepidopterorum (Gattung Zygaena) Im Laufenden Jahrgang Der Mitt. Der Munch. Ent. Ges. P.35-70, Max Bachmann

An

Z. Erebus Stdgr. Die Fig. 18 ist, wie sich bei einem nochmaligen Vergleich mit dem Original herausstellt, durch die bei dem Stück allein vorgenommene Retouche der roten Flügelteile diesem so unähnlich geworden, daß es am besten ist, sie als nicht vor-handen zu betrachten. Als Type für die ab. interrupta hat dann die Figur Romanoff's in Rom. Mem. Lep. 1. (1884) pi. IV, f. 4 zu gelten.

Nachtrage Und Berichtigungen Zu Burgeff H., Kommentar Zum Katalogus Lepidopterorum (Gattung Zygaena) Im Laufenden Jahrgang Der Mitt. Der Munch. Ent. Ges. P.35-70, Max Bachmann

An

Z. Erebus Stdgr. Die Fig. 18 ist, wie sich bei einem nochmaligen Vergleich mit dem Original herausstellt, durch die bei dem Stück allein vorgenommene Retouche der roten Flügelteile diesem so unähnlich geworden, daß es am besten ist, sie als nicht vor-handen zu betrachten. Als Type für die ab. interrupta hat dann die Figur Romanoff's in Rom. Mem. Lep. 1. (1884) pi. IV, f. 4 zu gelten.

Breeding Habits Of The Heteronereis Form Of Platynereis Megalops At Woods Hole, Mass., E. E. Just

Department of Biology Faculty Publications

No abstract provided.

Breeding Habits Of The Heteronereis Form Of Platynereis Megalops At Woods Hole, Mass., E. E. Just

Faculty Reprints

No abstract provided.

Summary Of Two Years' Study Of Insects In Relation To Pellagra, Allan H. Jennings

Harold W. Manter Laboratory of Parasitology: Library Materials

Excerpt:

With the growing interest in pellagra, following the authoritative recognition of its presence in the United States in 1907, the study of its etiology was taken up by various investigators and the several theories of causation were subjected to close scrutiny.

Prominent among these theories was that of insect transmission, first advanced by Sambon, who limited this function to the species of blood-sucking gnats comprising the genus Simulium.

The importance of the disease and the possibility of such a factor in its causation, led the Bureau of Entomology, late in 1911, to undertake an investigation of the subject …

Words Of Appreciation, O. W. Oestlund

Journal of the Minnesota Academy of Science

No abstract provided.

The Inheritance Of A Recurring Somatic Variation In Variegated Ears Of Maize, R. A. Emerson

Department of Agronomy and Horticulture: Faculty Publications

The inheritance of variegation has special interest and importance in genetics. It is with forms of variegation that the only two certainly known cases of non-Mendelian inheritance have had to do. I refer to Baur's experiments with Pelargonium, in which crosses of green-leaved and white-leaved forms exhibited somatic segregations in F₁ that bred true in later generations, and to Correns 's work with Mirabilis, which showed green and white leaf color, to be inherited through the mother only. De Vries's con- ception of "ever-sporting" varieties was apparently founded largely upon the behavior of variegated flowers in pedigree …

Multiple Factors Vs. "Golden Mean" In Size Inheritance, R. A. Emerson

Department of Agronomy and Horticulture: Faculty Publications

Groth's preliminary note on the "golden mean" in the inheritance of sizes in SCIENCE of April 17, 1914, pp. 581-584, deserves the attention of geneticists. Its publication is of such recent date that I need only call attention to one or two points that seem to me of particular moment.

In brief, Groth's hypothesis is that the mode

of inheritance in F_l not only of surfaces and

volumes, but also of linear dimensions is to be

expressed by √ab rather than by a + b /2

where a and b are parent sizes. The hypothesis

is based upon …

A Notable Botanical Career, Charles E. Bessey

School of Biological Sciences: Faculty Publications

I have before me the " Report of the Botanist" to the Regents of the University of the State of New York, bearing date of January 1, 1868, covering less than two pages, and signed by Charles H. Peck. There is internal evidence that his services began July 1, 1867, the writer reporting what he had accomplished in the half year since that date. A year later the " Report of the Botanist " covered about 80 pages and included a short general statement followed by (A) List of Species of Which Specimens Have Been Mounted; (B) Plants Collected; (C) …

Synopsis Of The Conjugate Algae-Zygophyceae, Charles E. Bessey

School of Biological Sciences: Faculty Publications

A dozen or more years ago the writer prepared a series of papers on these plants, which were published in volumes 21, 22 and 23 of these Transactions, and now it seems that time enough has elapsed to warrant another paper dealing with the same group, and including such revisions as are now made necessary because of our better knowledge of their structure, and the structure of the nearly related plants.

Contributions To A Science Of Nematology, Nathan Augustus Cobb

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Contents

I. Antarctic Marine Free-Living Nematodes of the Shackleton Expedition.

II. North American Free-Living Fresh-Water Nematodes.

III. The Asymmetry of the Nematode Bunonema inequale, n. sp.

IV. Selachinema, a New Nematode Genus with Remarkable Mandibles.

V. Notes on Nemas.

VI. The Mononchs, a Genus of Free-Living Predatory Nematodes.

VII. Filter-Bed Nemas: Nematodes of the Slow Sand Filter-Beds of American Cities.

VIII. The Orders and Classes of Nemas.

IX. One Hundred New Nemas (Type Species of 100 New Genera).

X. Howardula benigna, a Nemic Parasite Cucumber-Beetle.

XI. Marionella.

XII. Greeffiella.

XIII. An Amendation of Hoplolaimus …

Rocky Mountain Flowers, Frederic E. Clements, Edith Schwartz Clements

School of Biological Sciences: Faculty Publications

AN ILLUSTRATED GUIDE FOR PLANT-LOVERS AND PLANT-USERS WITH TWENTY-FIVE PLATES IN COLOR AND TWENTY-TWO PLATES IN BLACK AND WHITE

The present book is an endeavor to present the materials of the Rocky Mountain flora in preliminary form from the standpoint of the experimental ecologist. The latter is concerned primarily with the relationships of "species" and their subdivisions as an organic expression or measure of habitat differences, and of the competitive relations of the various formations. Whatever the taxonomic value of the numerous segregates of the last decade or two, the fact that the binomial form conceals the relationship to the …

Some Bees From New Brunswick, With Description Of A New Species Of Heriades, J. C. Crawford

Co

While collecting Ichneumonoidea in New Brunswick, Mr. A. Gordon Leavitt also collected a number of other Hyrnenoptera, and below is given a report on most of the Apoidea. Some of the material, mostly Megachilinae, Sphecodes and male Halictus, has not been identified, and is not included. A few of the determinations were made by Mr. H . L. Viereck, and credit is given in the proper places.

Biologie Südafrikanischer Apiden (Fortsetzung Aus Heft 4), H. Brauns

Bo

No abstract provided.

Chelonian Brain-Membranes, Brain-Bladder, Metapore And Metaplexus, John P. Munson

Biology Faculty Scholarship

The chelonian brain is not too small to be studied macroscopically. It is easily removed from the skull. Minute surface details and the cell structure can be easily observed.

Biologie Südafrikanischer Apiden, H. Brauns

Bo

No abstract provided.

Chromosomenverhaltinisse Bei Der Spermatogenese Solitarer Apiden (Osmia Oornuta Latr.), Ludwig Armbruster

An

A soemwhat labored paper, packed with detail, and heaviy documented. The author attempts to combine biological data - his own data culled from literature - with cytological observations in an attempt to shed light on the cytology of sex determination in these bees.

Forest Condition In Kentucky And Tennessee, Department Of Library Special Collections

Research Collections

No abstract provided.

Shorter Articles And Discussion Simplified Mendelian Formulae, R. A. Emerson

Department of Agronomy and Horticulture: Faculty Publications

I was somewhat surprised by 'Morgan's and Castle's suggestions for a simplification of Mendelian formulae. My surprise was not occasioned so much by the forms these suggestions took as by the fact that any pronounced changes were deemed necessary. I had not only employed the usual formula in my own work but had found no difficulty worth mentioning in understanding the formula used by most other workers in Mendelian fields. My experience with students in elementary courses in genetics had not prepared me for the idea that such formula were particularly difficult. Nevertheless I believe in simplifying the formulae if …

The Possible Origin Of Mutations In Somatic Cells, R. A. Emerson

Department of Agronomy and Horticulture: Faculty Publications

That mutations are accompanied by some change in the germ-plasm is, I take it, indisputable. Have we, however, any reason to suppose that the change takes place within the germ cells? I am not sure, as a matter of fact, that genetists in general regard the gametes as the place of origin of mutations. It is true, however, that experiments in the artificial production of mutations in plants have been limited largely to treatments of the ovaries from about the time of the reduction division to about the time of fertilization. This suggests a belief on the part of investigators …

Shorter Articles And Reports: The Simultaneous Modification Of Distinct Mendelian Factors, R. A. Emerson

Department of Agronomy and Horticulture: Faculty Publications

In another paper on the inheritance of a recurring somatic variation in variegated ears of maize, it was shown that the amount of red color developed in the pericarp of variegated seeds bears a definite relation to the development of color in the progeny of such seeds. The relation is such that the more color there is in the pericarp of the seeds planted the more likely are they to produce plants with wholly self-red ears and correspondingly the less likely to produce plants with variegated ears. Self-red ears thus produced behave just as if they were hybrids between self-red …

Some Of The Next Steps In Botanical Science, Charles E. Bessey

School of Biological Sciences: Faculty Publications

When one who has worked long in any

field of science speaks before an audience

such as this he is expected to say something

about the condition of his branch of science

when he began work with meager and

poorly adapted apparatus, to contrast it

with its greatly improved condition to-day,

and to dwell with pride upon the finely

equipped laboratories with costly apparatus

especially designed for particular

experiments, to be found by the twentieth

century scientific student. And 1 must

confess that the temptation to do so was

one difficult to resist, for we who have

grown old in …

Some American Lebertia, Ruth Marshall

School of Biological Sciences: Faculty Publications

The genus Lebertia of the water-mites is easily recognized by the character of the epimera. It belongs to a small group of genera, the subfamily Lebertiinae, characterized by the union of the four pairs of epimera into a single group, with their more or less complete fusion. This forms a shield which covers a large part of the ventral surface of the body.

Collecting Bees At Gualan, Guatemala, Wilmatte P. Cockerell

Co

No abstract provided.

Collecting Bees At Gualan, Guatamala, Wilmatte P. Cockerell

Co

No abstract provided.

Some Parasitic Bees (Coelioxys), T. D. A. Cockerell

Co

No abstract provided.

The Psychology Of Senescence: An Introductory Study, Charles W. St. John

Historical Dissertations & Theses

The following biographical studies have been made with the purpose of showing through concrete cases some aspects of mental decline in senescence. To the objection that each of these cases follows a course in a degree divergent from that of normal mental decline, the reply is that a study of these striking instanced, we believe, afford a more ready insight into the underlying phenomena than would a similar one which deals with average or typical cases. The significance of exceptional cases should not be underestimated. Certain peculiar conditions have been present which have modified the typical phenomena, but after due …

Animals And Plants Described As New From Colorado In 1911, T. D. A. Cockerell

Co

No abstract provided.