THE LIFE OF GLACIAL LAKE CHICAGO 



97 





Post- 

 Glacial" 



Recent 





Lake 

 Michigan 



Small 

 lakes 



Rivers 



Sloughs; 

 swamps 











X 

 X 

 X 

 X 

 X 

 X 

 X 

 X 

 X 

 X 

 X 

 X 

 X 

 X 









X 



X 







X 















X 





























X 



















X 

 X 

 X 

 X 

 X 





















X 

 X 







X 













X 

 X 







X 

 X 

 X 

 X 

 X 

 X 





X 







X 







X 



X 















X 



X 







X 

 X 





" fdbale 











X 



X 

 X 

 X 



X 













X 















rhoniboideum 





X 















Musculiutu partumeium 





X 



X 

 X 

 X 

 X 

 X 



X 



truncatum 



X 

 X 

 X 

 X 





X 



secure 





X 



X 



transversum 





X 



Pisidium** abdilutn 





X 





" abyssoTunt 



X 





" adamsi affine . 



X 

 X 

 X 



X . 









" compressum 



X 



X 







" compressum confertutn 











X 







" compressum rostrala .. 



X 







cruciatum 







X 

 X 

 X 





" fallax 



X 









handiverki 



















66 It will be noted that there are a number of Pisidia from the fossil deposits which have 

 not yet been found in the recent fauna. 



