Biological Station 



Graduate students, when regularly matriculated in the Univer- 

 sity and properly registered with the Dean of the Graduate Depart- 

 ment, may carry on work at the Station which will count toward an 

 advanced degree. 



For full information concerning the requirements for advanced 

 degrees, address the Dean of the Graduate Department, Ann Arbor, 

 Michigan. 



Zoology. 



10 1. The Natural History of Vertebrate Animals. — The course 

 deals chiefly with fishes, amphibians, and reptiles, not with birds 

 (see Course 107), and only incidentally with mammals. As far as 

 possible, all forms occurring in the region are collected, identified, 

 and their habits studied in both field and laboratory. Students thus 

 learn to recognize many of the native vertebrates at sight. In the 

 field special attention is given to methods of work. The general 

 problems of animal ecology, species behavior, evolution and taxonomy 

 are considered as shown by the field data. Although most of the 

 work is given in the field, attention to precise methods of observation 

 and to the correct use of data is required. 



Thursday. Two hours credit. Assistant Professor Ellis. 

 Prerequisite : Elementary collegiate zoology. 



This course gives one hour credit to graduate students. Such 

 students, wishing full credit, must perform extra work, and will reg- 

 ister for Course 101a. 



103. The Natural History of Invertebrate Animals. — -A. study of 

 the natural history of the aquatic invertebrates occurring in Douglas 

 Lake. This will involve the collection and identification of forms, 

 the determination of their life histories and of the adaptations and 

 environmental factors decisive in the matters of distribution and 

 survival. The class as a whole will carry through a definite program 

 but each member will be responsible for the data on a particular 

 group of organisms to be presented at the end of the course i" the 

 form of a careful detailed report. In addition the student will have 

 actual experience in the determination of depths, temperatures, trans- 

 parency to light, dissolved substances, food-content of the water, and 

 such other matters as fall within the scope of an analysis of the 

 lake as a medium for life. By means of the lectures and confer- 

 ences, the whole of the material collected will be correlated so that 

 at the end of the season each student will have a fairly comprehen- 

 sive picture of the conditions of life in an inland lake, and also 

 some special knowledge of some one group as affected by these 

 conditions. 



Wednesday and Friday. Four hours credit. Professor Glaser. 

 Prerequisite : Elementary collegiate zoology. 



