GASTEROPODA. 197 



*Polygyra thyroidus (Say). 



Pilsbry, Manual Conch., 1894, ser. 2, vol. 9, p. 77. 



Helix thyroidus Say, Journ. Acad. Nat. Sci. Phila., 1817, ser. 1, 

 vol. 1, p. 123. [United States.] 



Mesodon thyroides Binney, Bull. U. S. Nat. Mus., 1885, no. 28, 

 p. 313, fig. 335. 



Me. 

 Vt. 



Mass.^ — Cohasset; New Bedford; Westport; Dartmouth; 

 Swansea; Williamstown; Blue Hill; Naushon Id.; Clarendon 

 Hill. 



R. I. — Tiverton; Cumberland. 



Conn. — Greenwich. 



*Polygyra palliata (Say). 



Pilsbry, Manual Conch., 1894, ser. 2, vol. 9, p. 77. 



Helix palliata Say, Journ. Acad. Nat. Sci. Phila., 1821, ser. 1, 

 vol. 2, p. 152. " Illinois." 



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

 p. 284, fig. 303. 



Vt. — Mt. Ascutney, Windsor Co. ; Orange Co. 

 Mass.^ Berkshire Co. 



*Polygyra hirsuta (Say). 



Pilsbry, Manual Conch., 1894, ser. 2, vol. 9, p. 78. 



Helix hirsuta Say, Journ. Acad. Nat. Sci. Phila., 1817, ser. 1, 

 vol. 1, p. 17. [United States.] 



Sienotrema hirsutum Binney, Bull. U. S. Nat. Mus., 1885, no. 28, 

 p. 278, fig. 295. 



Mass.— Pittsfield (Roper). 



Conn. — Stonington; Weston; New Haven; Greenwich. 



*Polygyra fraterna (Say). 

 Walker, Rept. Geol. Surv. Mich., 1906, p. 470, fig. 23. 



