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. 



Pozi'cUcnsis C. C. Ads. 11. 



Clinchcnsis C. C. Ads. 11. 



fliirialis Say. 11. 



Verrucosa Rve. 12. 



Lyttoncnsis C. C. Ads. 12. 



Panlcnsis C. C. Ads. 12. 



Recta Rve. 12. 



Brcvis Anth. 12. 



Spinosa Lea. 13. 



Unakensis C. C. Ads. 13. 



Nolichnckycnsis C. C. Ads. 13. 



Angitrcmoides C. C. Ads. 14. 



Loitdoncnsis C. C. Ads. 14. 



Titrrita Anth. 14. 



TYPE LOCALITY. 



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 Rafinesque, p. 56. 



Add :— 



Section JUGOSUS Simpson, 1914. 



Shell with the dorsal slope strongly subradially plicate ; teeth unusually 

 strong. 

 Type : S. tvrightianus Walker. 



Genus SPH.^RIUM Scopoli, p. 188. 



In his "Preliminary Catalog of the North American Sphreriid?e (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: — 



Sphcrriastruin Bourguignat. 

 Cyrcnasfru m Bourguignat. 

 Corncola Clessin. 



Tvpe : S. rivicoluni (Leach). 

 Type: S. solidiun Normand. 

 Type: S. corncinn (Linne). 



The first is not represented in our fauna. 



