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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.

A Comparative Study Of The Structure And Origin Of The Yolk Nucleus, John P. Munson

Biology Faculty Scholarship

The question as to the comparative structure and origin of the yolk nucleus involves several other problems:

1. Is the yolk nucleus a normal element of the egg cytoplasm, or is it associated with pathological states of the egg, or is it an artefact due to reagents?

2. Is there a necessary connection between one form and another such that one can be derived from the other?

3. Is it an amorphous chemical substance or does it possess anything suggesting permanence of structure?

4. Does it arise de novo or is it a modification of something similar existing in the …

Spermatogenesis Of The Butterfly, Papilio Rutulus, John P. Munson

All Faculty Scholarship for the College of the Sciences

For a number of years I have been studying the spermatogenesis of Papilio rutulus (pl. 12, fig. 1) not ,with any one single problem especially in view, but with the aim of ascertaining the entire life history of its sperm cell, its various phases of development, its mode of growth and differentiation, the history of its several parts, and its relation to the organism.

Researches On The Oogenesis Of The Tortoise, Clemmys Marmorata, John P. Munson

Biology Faculty Scholarship

No abstract available.

A Preliminary Review Of The Birds Of Nebraska With Synopses, Lawrence Bruner, Robert H. Wolcott, Myron H. Swenk

Papers in Ornithology

In 1896, Prof. Bruner published his list entitled "Some Notes on Nebraska Birds." As a working basis for the study of the ornithology of the state it has proven invaluable and it has also been greatly in demand by people not ornithologists, who desired to "know something about our birds." That edition was exhausted some time ago and its author has been frequently urged to publish another. However, the organization of the Nebraska Ornithologists' Union and the development of ornithology in the University has led to such a rapid increase in our knowledge in the past five years that it …

Zoology In The High School Curriculum, Henry B. Ward

Studies from the University of Nebraska Zoological Laboratory

A long time has elapsed since Bacon gave to the world the sound advice that “ we should accustom ourselves to things themselves.” Little by little this idea has gained ground, until now it is recognized as a general principle in every grade of educational work and in widely separated departments of study that contact with concrete objects is far more inspiring and thought-producing than the mere scanning of black marks on a white page. So far as natural science is concerned, the varied training which it affords has been abundantly discussed before this association and elsewhere. To be sure, …

Animal Parasites Of Nebraska, Henry B. Ward

Studies from the University of Nebraska Zoological Laboratory

The report submitted this year consists of two main portions: the first a short study on the numerical frequence of parasites among the dog, cat, and chickens of Nebraska, and the second of several brief accounts of new and important parasites discovered within the state since the publication of the last report.

A Biological Examination Of Lake Michigan In The Traverse Bay Region, Henry B. Ward

Studies from the University of Nebraska Zoological Laboratory

During the summer of 1893 the Michigan Fish Commission entered upon a biological study of the Great Lakes by maintaining a party on Lake St. Clair. In the report of that two months, written by the director of the laboratory, Professor J. E. Reighard, are given in full the reasons which led to the inception of the undertaking and the aims which its promoters held in view. A study of the life of the lake in all its manifold interrelations and especially of those factors which bore upon the welfare of the food fishes in general and the young whitefish …

The Food Supply Of The Great Lakes; And Some Experiments On Its Amount And Distribution, Henry B. Ward

Studies from the University of Nebraska Zoological Laboratory

The subject of agriculture has received for many years the closest attention of scientific workers. Not only the character of the different products, their food value for different uses and in connection with the raising of different kinds of stock ; but also the value of the soil, the use of each element in it, the exact relation of each individual particle in the entire chain of biological relations from the unorganized matter to the saleable beef or pork, has received from the experiment stations of the country the most careful study. Every one of the pests, of the enemies …

A New Method For The Quantitative Determination Of Plankton Hauls, Henry B. Ward

Studies from the University of Nebraska Zoological Laboratory

Only two methods of estimating the quantity of plankton obtained in a haul of the vertical net are known to me. These two may be called the volumetric and the gravimetric. Both have been used by observers in various parts of the world, but so far as I know have never been comparatively tested in order to ascertain the relative value of results obtained by the two. The experience of the past year has shown some disadvantages in the first method, while the second has certain evident objections which rendered its employment in this case out of the question. In …

The Asiatic Lung-Distome In The United States, Henry B. Ward

Studies from the University of Nebraska Zoological Laboratory

In 1893 I reported the occurrence of the Asiatic distome in the lungs of a cat examined in Ann Arbor, Mich. This was the first reported find of this species on this continent, and the possibility of its being a permanent guest in this country was so serious that I urged a careful examination of all cases of lung-parasites in the domestic animals, with a view to ascertaining whether this might be an isolated instance, or whether the parasite was actually established within our land, for it is true that the Chinese, among whom the parasite is very common, regard …

Development Of The Femur Of The Cat, E. A. Brown

Manuscript Thesis Collection

Abstract unavailable.

The Food Supply Of The Fish In The Great Lakes, Henry B. Ward

Studies from the University of Nebraska Zoological Laboratory

When the early settlers made their homes along the shores of the Great Lakes, the waters of these inland seas teemed with fish. A cheap and apparently inexhaustible supply of food lay within easy reach, and they drew from it unstinted, nor was it strange that, with the increasing population and ever-widening means of communication, delicacies so tempting as the whitefish and lake trout were eagerly sought after in the markets of the neighboring cities, and that the ingenuity of generations of fishing folk was taxed to invent means of securing the fish-until finally, in the face of a growing …

Some Notes On The Biological Relations Of The Fish Parasites Of The Great Lakes, Henry B. Ward

Studies from the University of Nebraska Zoological Laboratory

A pond or small lake furnishes few variations in depth, temperature, current, or food, and hence the life in it is comparatively uniform. Nowhere else in the world is there found such a continuous body of fresh water as in the Great Lakes. They afford, in themselves alone, an area of water one-fourth greater than that of the state of Nebraska; or, considering the streams and minor lakes within easy reach, no doubt the area is twice as great. Furthermore, there are found here conditions of temperature, depth, light and food more nearly like those prevailing in the ocean. As …

On The Parasites Of The Lake Fish: Notes On The Structure And Life History Of Distoma Opacum, N. Sp., Henry B. Ward

Studies from the University of Nebraska Zoological Laboratory

This work was done while a member of the scientific corps sent out by the Michigan Fish Commission to begin an investigation of the biological conditions in the Great Lakes. The work in 1893 was carried on at New Baltimore, on Lake St. Clair. My thanks are due to the Michigan Board of Fish Commissioners for the many conveniences placed at my disposal in carrying out the investigations on fish parasites, of which this is one result. To Professor J. E. Reighard, director of the party, I owe much for his interest and hearty cooperation in all matters pertaining to …

A Preliminary Report On The Worms (Mostly Parasitic) Collected In Lakes St. Clair, In The Summer Of 1893, Henry B. Ward

Studies from the University of Nebraska Zoological Laboratory

In the work done on the fauna and flora of Lake St. Clair during the summer of 1893, the group of Vermes was entrusted to the writer. The following is submitted as a preliminary report on the ground covered, the material obtained, and the results of this branch of the work so far as they can be seen at this stage.

Excluding the Rotifera, which were studied by another member of the party, the Vermes are represented in fresh water by three great classes: the Plathelminthes (Flatworms), Nemathelminthes (Round or Threadworms), and the Annelida (Segmented-worms).

The Rodentia In Evolution: A Preliminary Study, H. L. Osborn

Journal of the Minnesota Academy of Science

No abstract provided.

Report On The Birds Of Minnesota, P. L. Hatch

Journal of the Minnesota Academy of Science

No abstract provided.

De Bestiis Marinis Or, The Beasts Of The Sea, Georg Wilhelm Steller

Zea E-Books in American Studies

Steller’s classic work, published in Latin in 1751 and in German in 1753, contains the only scientific description from life of the Steller’s sea cow (Hydrodamalis gigas), as well as the first scientific descriptions of the fur seal or “sea bear” (Callorhinus ursinus), Steller’s sea lion (Eumetopias jubatus), and the sea otter (Enhydra lutris).

Steller’s sea cow was a sirenian, or manatee, inhabiting the North Pacific Ocean and Bering Sea. It was first discovered by Europeans in 1741 and rendered extinct by 1768. It was a 30-foot long, plant-eating aquatic mammal, weighing …