J 



Fiif. ^2.-Gomohosis brevtsftra. the commonest snai! of Cumberland River 



and Straight Creek, x 4. 



c 



# 



Fig. 'i.-i.—Physa sayi. from Straight 

 Creek, x 4. 



p,cr, -^^.—Plaiiortis bicariiiatus. from Straight 

 Creek, x 4. 



