GASTEROPODA. 217 



Helix minutaSa,y, Joum. Acad. Nat. Sci. Phila., 1817, ser. 1, 

 vol. 1, p. 123. 



Me.— Mt. Desert. 

 Mass. — New Bedford. 



*Vallonia excentrica Sterki. 



Sterki, Proc. Acad. Nat. Sci. Phila., 1893, p. 252, pi. 8, figs. B, M. 

 [Europe and eastern North America] Pilsbry, Manual 

 Conch., 1892, ser. 2, vol. 8, p. 249, pi. 32, figs. 6-9. 



Me. — Caribou; Saco; Cape Elizabeth; Cliff Island. 

 Mass. — Cambridge; Duxbury; New Bedford. 



*Vallonia costata (Miiller). 



Pilsbry, Manual Conch., 1892, ser. 2, vol. 8, p. 252, pi. 32, figs. 

 18-22, 27; pi. 33, fig. 54. 



Helix costata Muller, Verm. Terr, et Fluv. Hist., 1774, vol. 2, 

 p. 31. "in loco elevato Fridrichsdalensis." 



Me. — Great Cranberry Island; Rockland; Aroostook Co. 

 Mass. — Uxbridge; Cambridge. 



