FAMILY ENDODONTID^E 49 



Range. Northern Idaho, at Old Mission. Like other species of 

 northern Idaho this probably extends across the parallel into British 

 America. 



Family ENDODONTIRffi. 

 Genus Pyramidula Fitzinger. 



Subgenus Patula Held. 

 Pyramidula solitaria Say. 



Helix solitaria SAY, Journ. Acad. Nat. Sci. Phila., u, p. 157, 1821. BIN- 

 NEY, Terr. Moll. U. S., I, p. 254, pi. viu, figs. 6-10 ; u, p. 208, pi. 

 xxiv, 1851. 



Patula solitaria (SAY) BINNEY, Man. Am. Landsh., p. 254, figs. 263, 267, 

 268, 1885. 



Helix limitaris DAWSON, Rep. Brit. N. Am. Boundary Survey, Geology, pp. 



347-35. 1875. 



Pyramidula solitaria limitaris PILSBRY, Class. Cat. Am. Landsh., p. 31, 1898. 

 Patula solitaria var. occidentalism w MARTENS, fide Pilsbry, 1. c., p. 31, 1898. 



Range. Arkansas north to Ohio, west to eastern Oregon, and 

 northward in Alberta. 



Var. limitaris, Waterton Lake, Rocky Mts. in Alberta; northern 

 Idaho. 



Var. occidentalis, Dalles of the Columbia near Fort Vancouver; 

 Coeur d'Alene Mts., Idaho. 



34 

 FIGS. 33-35. Pyramidula alternata Say. 



* Pyramidula alternata Say. 



Helix alternata SAY, Nicholson's Encycl., ist Am. ed., u, pi. i, fig. 2, 1817. 



BINNEY, Land and Fw. Sh. N. Am., i, p. 73, figs. 122-129, 1869. 

 Anguispira alternata MORSE, Journ. Portland Soc. N. Hist., I, p. 1 1, fig. 15, 



pi. iv, fig. 1 6, 1864. 

 Helix dubia SHEPARD, Trans. Lit. Sci. Soc. Quebec, i, p. 194, 1829. 



Range. Eastern North America as far north as Nova Scotia, 

 Lower Canada, and the international boundary. 



Lake of the Woods ! (Kennicott) ; Canso, Nova Scotia {fide Bin- 

 ney). 



Binney (op. cit., pp. 74, 76) gives the northeastern range of this 

 species as Labrador, but Canso, where his specimens were obtained, is 



