158 



BIBLIOGRAPHY OF 



€*oml(l. — Catalogue of Shells with descriptions of New Species: 

 by I>r. A . A. Gould. (From Agassiz's Lake Superior, Boston, 

 1850.) 

 [Localities are given, and descriptions of those specified as new. — 



w. a. b.] 



Helix electrina Could. 



chersina Say. 

 Vitrina limpida Could (n. s.) 



V. pellucida Say. 

 Succinea ovalis Could. 



obliqua Say. 



avara Say. 

 Physa heterostropha Say. 



vinosa Could (n. sp., pi. 

 ' vii, fig. 10, 11). 



