PAPERS OX BIOLOGY AND AGRICULTURE 199 



GENERAL SURVEY OF THE FAUNA OF LAKE KNOX— Concluded. 



Phylum Chordata — Concluded 

 Class ilammalin 



Order Glires rhodents 

 Family iluridae 



Subfamily Min-otinae 

 Fiber zihetJiicus 



A dead muskrat was seen on the street 

 car track. Muskrat mounds made 

 largely of cat tails are very abundant, 

 and a boy trapping said that he caught 

 thirty muskrats in one day. 

 Microius pennsulvanicus 



Field mice were seen south of the pond. 

 Family Sciuridae 

 Arctomys inonax 



The woodchuck was seen near the ditch just south 

 of the pond Oct. 2. 

 Family Leporidae 



Lexus ftordianus inearnsi 



The prairie cotton tail were very common about 

 the pond. 



Mail's relations to the life of the pond cannot help 

 being noticed. In the first place the pond is artificial; 

 furthermore it is changed to fit man's needs. In addi- 

 tion to the effect on the pond and its water supply man 

 affects the animals directly. He kills game, the street 

 car runs over animals "which live upon animals and plants 

 in the pond. He changes the physical surroundings 

 which affect the life of the animals. Man does much 

 that affects animal life, but still there is a balance. 



