GASTEROPODA. 113 



*Valvata tricarinata basalis Vanatta. 



Vanatta, Nautilus, 1915, vol. 28, p. 105, figs. 3, 4. " Hudson 

 River, New York." 



Vt. — Shelburne Bay, Lake Champlain. 



*Valvata tricarinata unicarinata DeKay. 



Valvata unicarinata DeKay, Nat. Hist. N. Y., Moll., 1843, p. 118, 

 pi. 6, fig. 129. " Lake Champlain * * Erie canal." 



Vt. — Shelburne Bay, Lake Champlain. 



* Valvata tricarinata simplex Gould. 

 Gould, Inv. Mass., 1841, p. 226. " Vermont." 

 Vt. — Shelburne Bay, Lake Champlain. . 



Valvata sincera Say. 



Say, Narrative Long's Exped., 1824, vol. 2, p. 264, pi. 15, fig. 11. 

 " north-west Territory." 



Me. — Dredged in the Fish River Lakes (Nylander). 

 Vt. 



*Valvata sincera nylanderi Dall. 



Valvata (sincera var. ?) nylanderi Dall, Harriman Alaska Exped., 

 1905, vol. 13, p. 122. " Aroostook County, Maine." 



Me. — Portage Lake, Fish River. 



Valvata lewisi Currier. 



Currier, Misc. Pub. Kent Sci. Inst., 1868, no. 1, p. 9. Dall, 

 Harriman Alaska Exped., 1905, vol. 13, p. 123, fig. 44. 



Valvata striata Lewis, Proe. Acad. Nat. Sci. Phila., 1856, p. 260 

 (non Philippi, 1836). [Otsego Co., N. Y.] 



Vt. 



