animals are collected and identified, so that students will 

 gain a general familiarity with them and learn to recog- 

 nize the common species at sight. The principles of fresh 

 water biology are especially emphasized. Attention is 

 given to exact methods of field observations and the mak- 

 ing of field records. The field work is supplemented by 

 a more detailed examination of animals in the laboratory ; 

 here the adaptations which make certain organisms suited 

 to particular habitats are studied. In the conferences, 

 the relation of observations to general problems is dis- 

 cussed. This course attempts to give an intimate 

 knowledge of outdoor life, to make one at home with in- 

 vertebrates in the field. 



Wednesday and Friday. Four hours credit. Assistant 

 Professor Hegner. 



Prerequisite: Elementary collegiate zoology. 



This course gives two hours credit to graduate stu- 

 dents. Such students, wishing full credit, must perform 

 extra work, and will register for Course 2a. 



3. The Natural History of Birds. — Birds are studied 

 with especial reference to their environment. The field 

 work includes identification by eye and ear, observations 

 on habitat preferences, food habits, nesting activities, and 

 the early autumnal migration movements. In the confer- 

 ences attention is given to the position of birds in the 

 animal kingdom, some of the adaptations to particular 

 modes of life, their economic relations, and the facts and 

 theories of their distribution and annual migration move- 

 ments. The bird fauna is abundant and the opportunities 

 for the study of some of the northern species are espec- 

 ially good. 



Saturday morning, and two or three early morning 

 trips to be arranged. Two hours credit. Mr. Wood. 

 No prerequisite. 

 This course does not give credit to graduate students. 



4. The Natural History of Insects. — This course is 

 intended to give the student a general acquaintance with 

 the insects of the region and to afford opportunity for the 

 study of the various forms in their native habitats. Field 



