GASTEROPODA. 195 



Me. — Rockland (Lermond). 



Mass. — Martlias Vineyard, near Gay Head (Thomson). 



Hygromia rufescens (Pennant). 



Pilsbry, Manual Conch., 1894, ser. 2, vol. 9, p. 274. 



Helix rufescens Pennant, Brit. Zool., 1777, vol. 4, p. 134, pi. 85, 

 fig. 127. [England.] 



Fruticicola rufescens Binney, Bull. U. S. Nat. Mus., 1885, no. 28, 

 p. 464, fig. 506. 



Mass.^ Naushon Island, near the " French water place " 

 (Thomson). 



*Polygyra tridentata (Say). 



Pilsbry, Manual Conch., 1894, ser. 2, vol. 9, p. 76. 



Helix tridentata Say, Nich. Encycl., 1816, vol. 2, pi. 2, fig. 1. 

 "Middle States." Gould, Inv. Mass., 1870, p. 422, fig. 680. 



Triodopsis tridentata Binney, Bull. U. S. Nat. Mus., 1885, no. 28, 

 p. 291, fig. 312. 



N. H. — Concord; Squam Lake. 



Vt. — Burlington; St. Johnsbury; Newport; Coventry; Mt. 

 Equinox; Sudbury; Mt. Ascutney. 



Mass. — North Adams; Williamstown; Bashbish Falls; 

 Chester. 



Conn. — Stratford; Greenwich. 



*Polygyra sayana Pilsbry. 



Pilsbry, Proc. Acad. Nat. Sci. Phila., 1906, p. 127. 



Helix diodonta Say, Narrative Long's Exped., 1824, vol. 2, p. 257, 

 pi. 15, fig. 4 (non Muhlfeld). " New York." 



Helix sayii A. Binney, Boston Joum. Nat. Hist., 1840, vol. 3, 

 p. 379, pi. 16 (non Wood, 1828). 



Me. — Caribou; Woodland; Capens, Moosehead Lake; Bethel; 

 Bangor; Bridge ton. 



