FRESH-WATER MUSSELS. 



145 



1 m 



Fig. 9— Glochidia of common fresh-water mussels. (After Surber, 1912 an5 19J5.) 



[, Alasmidonta calceola. 

 ), Alasmidonta marginata. 

 ', Anodonta corptdcnta. 

 ^ A nodonta grandis. 

 ', A nodonta imbcciltis. 

 , Anodonta suborbiculata. 



g, Anodontoides fcrussacianus 



suhcylindraceu s . 

 h, Arcidens confragosus. 

 i, CypTogenia irrorala. 

 j, Dromus dramas. 



k, Lampsilis anodontoides. 

 I, Lampsilis brevicultts brittsi. 

 m, Lampsilis fallaciosa. 

 n, Lampsilis gracilis, 

 o, Lampsilis higginsii. 



