GASTEROPODA. 189 



Planorbis antrosus striatus Baker. 



Planorhis hicarinatus striatus Baker, Nautilus, 1902, vol. 15, 

 p. 120. "Milwaukee, Wisconsin [pleistocene]." Baker, Trans. 

 Acad. Sci. St. Louis, 1906, vol. 16, p. 9, pi. l,fig. 11. 



Me. — Square Lake; Roekville. 

 N. H.— Profile Lake. 



*Planorbis antrosus portagensis Baker. 



Planorhis bicari^iatus portagensis Baker, Nautilus, 1908, vol. 22, 

 p. 45. "Portage Lake, on Fish River, Aroostook County, 

 Maine." Walker, Nautilus, 1909, vol. 23, p. 8, pi. 1, fig. 9. 



Me. — Square Lake; Cross Lake; Second Lake and Moosehead 

 Lake. 



*Planorbis trivolvis Say. 



Say, Nich. EncycL, 1817, vol. 2, pi. 11, fig. 2. " French Creek 

 near Lake Erie." Gould, Inv. Mass., 1870, p. 488, fig. 740. 



Me. to Conn. — Common in most of the ponds and streams. 



*Planorbis trivolvis fallax Haldeman. 



Haldeman, Monogr. Limniades, 1844, no. 7, p. 15, pi. 3, figs. 1-3. 

 "Massachusetts, Lake Erie, Indiana.?" 

 Planorbis lentus Gould, Inv. Mass., 1870, p. 490, fig. 741 {non 



Say). 



Me.— Unity. 



Vt. 



Mass. — Revere; Mystic Lake, Arlington. 



*Planorbis binneyi Tryon. 



Tryon, Amer. Joum. Conch., 1867, vol. 3, p. 197. 



Planorhis corpulentus Gould, U. S. Expl. Exped. under Wilkes, 

 1852, vol. 12, p. 113; Atlas, pi. 8, figs. 130, a, b (nmi Say). " Co- 

 lumbia RrvER, Oregon." 



