ADDENDA 



Genus lO Lea, p. 149. 



For an elaborate paper on "The Variations and Ecoolgical Distribution 

 of the Snails of the Genus lo" by Charles C. Adams, see, Memoirs of the 

 National Academy of Sciences, XII, 191 5, Part II, Second Memoir. 



1 he following "races and forms" are recognized and described : — 



name;. page 



PozvellensisC. C. Ads. 11 



Clinchensis C. C. Ads. 11 



Pluvialis Say. 11 



Verrucosa Rve. 12 



Lyttonensis C. C. Ads. 12. 



Pmilcnsis C. C. Ads. \2 



Recta Rve. 12 



Brevis Anth. 12 



Spinosa Lea. 13 



Unakensis C. C. Ads. 13 



Nolichn-ckyensis C. C. Ads. 13 



Angitremoides C. C. Ads. 14 



Loiidonensis C. C. Ads. 14 



Turrit a Anth. 14 



TYPE IvOCALlTY. 

 Powell R., dinger, Va. 

 Clinch R., Cleveland, Va. 

 N. Fork, Holston R., Saltville, Va. 

 S. Fork, Holston R., Bluff City, Tenn. 

 Powell R., Pennington Gap, Va. 

 Clinch R., St. Paul, Va. 

 Holston R., Kingsport, Tenn. 

 Clinch R., Kyle Ford, Tenn. 

 Holston R., Morristown, Tenn. 

 Nolichucky R., Conkling, Tenn. 

 Nolichucky R., White Pine, Tenn. 

 Tennessee R., Looney's Id., Knox- 



ville, Tenn. 

 Tennessee R., Loudon, Tenn. 

 Tennessee R., Bellefonte, Tenn. 



Genus STROPHITUS Raflnesque, p. 56. 



Add 



Section JUGOSUS Simpson, 1914. 



Shell with the dorsal slope strongly subradially plicate ; teeth unusually 

 strong. 

 Type : 5. zvrightianus Walker. 



Genus SPH^RIUM Scopoli, p. 188. 



In his "Preliminary Catalog of the North American Sphaeriidse (125. p. 

 472) Sterki recognizes three subgenera, but they are not so defined as to be 

 included in the systematic portion of this paper. They are : — 



SpIiTriastrum Bourguignat. 

 Cyrenastrum Bourguignat. 

 CorneoJa Clessin. 



Tvpe : 5*. rivicolum (Leach), 

 Type: S. solidiim Normand. 

 Type: S. corneum (Linne). 



The first is not represented in our fauna. 



