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BIBLIOGRAPIIY OF 



Page. 



22 Unio verrucosus Barnes. 

 U. tuberculoid? Raf. 

 tuberculosa Valen. 

 verrucosus purpureus 



Hild. 

 tuberculalus Conrad. 

 22 graniferus Lea. 



(Errata) pernodosusZea. 

 22 irroratu3 Lea. 



U. verrucosus alius Hild. 

 stegarius Conrad. 



22 caperatus L.ea. 



I', abacoidi s Hald. 



23 dromas Lea, 



23 Lamarckianus Lea. 



23 .ffisopus Grei n. 



U. cicatricosus Conrad. 

 varicosus Conrad. 

 cyphius Conrad. 

 23 varicosus Lea. 



U. cicatricosus? Say. 

 cicatricosus Conrad. 

 23 perplexus Lea. 



U, gibbosus? Raf. 

 gibbosus Conrad. 

 23 tuberculatus Barnes. 



U. pustulata Swain. 

 23 cylindricus Say. 



U. naviformis Lam. 



(c. Spinous.) 

 23 spinosus Lea. 



23 collinus Conrad. 



(d. Smooth.) 



23 arcaeformis Lea. 



I '. hi xus Say. 

 23 triangularis Barnes. 



I '. formosus Lea. 

 cum 'iia.< Swain. 

 2 J Foremanianus Lea. 



23 elegans Lea. 



I . truncatus Say. 



24 donaciformis Lea. 

 24 zigzag Lea. 



24 heterodon Lea. 



