NORTH AMERICAN CONCHOLOGY. 29 



[Chenu, Bibliothbque Couclijliologique.] 

 Page. PI. Fig. Name. 



Sab-genus Aximedia. 



13 Uuio elliptica Rnf. 



13 i 11-13 levigata Raf. 



13 zonalis Raf. 



Sub-Genus Eukynia. 



1 3 Unio dilatata Raf. 



13 i 14-15 latissima Raf. 



13 solenoides Raf. 



13 var. interrupta Raf 



13 nodosa Raf. 



13 cylindrioa Saij. 



Genus LAMPSILIS. 



14 i 16-19 Lampsilis cardium Raf. 



Uiiio cardium Raf. 

 14 ovata Sai/. 



Unio 01-attis Say. 

 14 fasciola Raf 



14 rosea Raf. 



14 pallida Raf. 



Genus METAPTERA. 



15 i 20-22 Metaptera megaptera Raf. 



Unio me(/a/itera Raf. 

 15 ochraceus Say. 



Unio oc/iraceus Say. 

 15 cariosus Say. 



Unio cariosus Say. 



Genus TRUNCILLA. 



15 ii 1-4 Trunoilla triqueter Raf 



Unio triqueter Raf. 



16 truncata Raf 



Unio truncata Raf. 

 16 var. fusca Raf 



16 vermiculata Raf 



Genus OBLIQUARIA. 

 Sub-Genus Plagiola. 



16 Obliquaria decorticata Raf 



Unio decorticata Raf. 



