196 



THE CHICAGO ACADEMY OF SCIENCES. 



VERMONT: Lake Ghamplain (Am. Mus. N. H. ; Ball; Ingalls; Lea; Call; 

 Emmons; Jay). 



WISCONSIN: Milwaukee, Milwaukee Co. (Lapham). 



Distribution of 

 GALBA TRUNCATULA 

 GALBA CUBENSIS 



DODD8I 

 ACELLA HALDEMANI 



FIG. 15. 



