234 



BIBLIOGRAPHY OP 



38 

 38 

 38 



39 

 39 



Unio arcus Conrad. 

 arctatus Conrad. 

 gibbosus Barries. 



U. mucronatus Barnes. 

 nasuta Lam. 

 dilatata? Raf. 

 dilataius Conrad. 

 arctior Lea. 

 Vaughanianus Lea. 



U. Carolinensis Rav. lett. 

 purpuratus Lam. 

 Mtja ventricosa Solan. 



Page. 



U. ater Lea. 

 luguhris Say. 

 Poulsoni Conrad. 

 39 Unio cuprinus Lea. 



U. metallicus Say. 

 39 modioliforrais Lea. 



U. delumbis Conrad. 

 39 tenerus Rav. 



U. tenehrosus Conrad. 

 39 Tappanianus Lea. 



39 stramineus Conrad. 



40 monodontus Sa)/. 



U. soleniformis Lea. 



[The following species are known to tlie author hy name only. — W. G. B.] 

 Page. I Page. 



41 Unio Groenlandicus Schrot. 41 Unio oviformis Conrad. 

 41 purpuriatus Say. \ 41 furvus Conrad. 



Subgenus 

 (Stmphtnote.) 

 (a. Plicate.) 



43 Margaritana complanata Lea 



Alas, complanata Barnes 

 Spnpk, complanata Lea. 





(NON Symphynote.) 



44 





(a. Plicate.) 



43 



confragosa Lea. 



Alas, confragosa Say. 



45 



43 



aroula Lea. 





43 



marginata Lea. 







Alas, marginata Say. 



45 





iruncata Say. 







Unio cariosa Lam. (var. 2.) 







varicosa Lam. 







calceolus Say. 







Mya regulosa Wood. 





44 



■ rugosa Lea. 



Alas, rugosa Barnes. 

 ahducta Say. 



(b. Smooth.) 





44 



deltoidea Lea. 





44 



undulata Lea. 



46 





Alas, undulata Say. 



46 



garitana,. 



Alas, sculptilis (y'ug)Say. 

 3fya undulata Wood. 

 Unio Mans Valen. 



glahratus Sowb. 

 44 Margaritana Raveneliana 



Lea. 

 radiata Lea. 



Alas, radiata Conrad. 

 oalceola Lea. 



Unio calceolus Lea. 

 Alas, marginata Say. 

 truncata Conrad, 

 margaritifera Lea. 



Alya margaritifera Linn. 

 Margaritana fiuviatilis 



Sebum. 

 Unio elongata Lam. 

 sinuata Pfeif. 

 Roissyi Micb. 

 margaritiferus Pfeif. 

 rivalis Zeig. 

 Al. margaritiferum Flem. 

 arcuata Barnes. 

 Holstonia Lea. 

 fabula Lea. 



