24 PAPERS ON ZOOLOGY OF MICHIGAN. 



the fish in Kratt Lake to be feeding on animal and plant material. The 

 stomach contents were as follows: insect fragments (heads of hemip- 

 terous insects and parts of beetles), pieces of wood, alga fragments, 

 leaves of Sparganium or Ericaulon, and water lily seeds. 



17. Micropterus salmoides (Lacepede). Large-mouth Black Bass. — 

 Small specimens were very abundant on shoals of South Twin Lake, 

 but none were noticed elsewhere. Those caught measured 34-78 mm. 

 in length. In the stomachs examined were fish bones, teeth of a minnow^, 

 entomostracans, and Chironomus larvae. (3ne comparatively large 

 specimen (265 mm.) was caught with hook and line in South Twin 

 Lake.- 



18. Perca flavescens (Mitchill). Yellow Perch. — Found at South 

 Twin Lake, Bear Lake and Kratt Lake. Small specimens were generally 

 distributed on shoals in South Twin Lake. Some of those taken were 

 43-70 mm. long. None were found on the shoals of Kratt Lake or 

 Stonington Lakes. Larger perch (133-185 mm.) were taken from deep 

 w'ater off the shoals in South Twin Lake, Bear Lake and Kratt Lake. 



19. Etheostoma iowae, Jordan and Meek. — Found only in Bear Lake, 

 where four were taken in shallow water on a sandj^ bottom. These 

 were 37-45 mm. in length. 



