THE JOURNAL 



- OF THE - 



Cincinnati Society of Natural History. 



Voiv. XVII. Cincinnati, July, 1894. No. 2. 



NATURAL HISTORY NOTES FROM NORTH 



CAROLINA. 



By A. G. Wetherby. 

 Number Three. 



THE LAND SHELLS OF ROAN MOUNTAIN AND VICINITY, 



CONTINUED. 



23. Z. ligerus Say. This species is represented here, but 

 varieties of the local form graduate into the next in a way to 

 puzzle the most careful student of these specimens. Acerriis 

 has generally been regarded as a variety of demissus. It is a 

 more solid shell than the typical ligerus^ and has a more pol- 

 ished appearance, owing to its less pronounced sculpture. 

 The species in question ranges here through great variation 

 in size and elevation of spire. It seems clear to me that all 

 the sections of the Zonitin.K, to wit, Gastrodonta Omphalina 

 and Vitrea must suffer a marked reduction in species if we 

 care for accuracy of determination. 



24. Z. acerrus Lewis. Enough has been said about this 

 form in the notes on demissus and ligerus. I collected elegant 

 types of this form at Walker's Ford of Clinch River, in Union 

 County, Tenn., in 1877, and have found it at other localities 

 in both Tennessee and North Carolina many times since. 



25. Z. subp/anus Binney. In my Notes on American Land 

 Shells, No. 2, this journal, December, 1881, I mentioned the 



