285 



Unio pressus Lea, Anodoyita suhcylindracea Lea, Anodonta imbecillis 

 Say, Unio jihxtseolus Hildreth, Unio circulns Lea, Unio parvus Barnes, 

 and Lampsilis gracilis (Barnes). We have seen representatives of none 

 of these species from the lake, and while some, such as Anodonta im- 

 becillis* and A. suhcylindracea are very probably present, the presence of 

 the others is very improbable. 



* Since the above was written a single specimen of Anodonta imbecillis. from Lost 

 Lake, has been seen. 



