164 PHYSA. 



narrow, the lip much thickened within ; colu- 

 mellar lip heavy, polished, slightly twisted 

 and turned back; texture thin, diaphanous, 

 surface almost unmarked by growth-lines, 

 brilliantly polished, and bright oil-colored; 

 columella tinged with pink, lip margined 

 with dark red. 



Length 12, diam. 7 mill. 



"Western and Southern States. 



This species, of which I have seen nume- 

 rous examples of all ages, is much shorter in 

 the spire, more oval, and diflerently colored 

 from Ph. gyrina, Say. Ph. hrevispira, Lea, is 

 differently colored and more inflated, and 

 finally Ph. Primeana, nob., is a smaller spe- 

 cies, with distinct striae, longer spire and more 

 inflated. It is, I think, the most beautiful 

 species of the genus yet detected in the 

 United States. 



The above is my description of Ph. oleacea, 

 which I reproduce here as a pretty full char- 

 acterization of the species in which mine 

 merges as a synonym. 



(80) 



