FAMILY HELICID^E 



25 



which had any parietal tooth. The mountain forms from California, 

 if not hybrids, are so very different from the hairy coast or lowland 

 shells that one is tempted to regard them as distinct ; they frequently 

 are rough, hairless, with heavy lip and well marked parietal tooth. A 

 young specimen of the typical form, collected near Yakutat Village 

 by the Harriman Expedition, is reversed. 



Some specimens of this and another species, both of which are con- 

 fined to wooded regions so far as authentically known, were once sent 

 me as from a point considerably north of Yakutat and from the tree- 

 less region. I do not believe these shells were correctly labelled, and 

 hence have not included them in the list of localities. My own im- 

 pression is that the extension northward of this species and Circinaria 

 vancouverensis has been prevented by the wide stretch of glacial area 

 just north and west from Yakutat Bay. I have searched for this 

 species at Prince William Sound and Cook Inlet, in suitable situa- 

 tions, but without success. 



Polygyra townsendiana Lea. 



Helix townsendiana Lea, Trans. Am. Phil. Soc, VI, p. 99, pi. xxill, fig. 80, 

 1839. — Binney, Land and Fvv. Sh. N. Am., 1, p. 164, fig. 285, 1869. 



Range. — Puget Sound region and south (to northern Califor- 

 nia?). Seattle, Wash.; Lake Chilliwak and Sumas Prairie, British 

 Columbia. 



Eastward from the moist coast region the following species oc- 

 curs and is sometimes regarded as a depauperate form of P. town- 

 sendiana. 



* Polygyra ptychophora Brown. 



Helix ptychophora A. D. Brown, Journ. de Conchyl. , 3me Ser. , x, p. 392, 



Oct., 1870. 

 Arionta townsendiana var. ptychophora, Binney, Man. Am. Landsh., p. 129, 



fig. 102, 1885. 



Range. — Western Montana (at Deer Lodge) westward through 

 northern Idaho to Spokane, Wash., and to The Dalles, in northern 

 Oregon. 



It is possible that this form may hereafter be found on the northern 

 side of the boundary. 



Polygyra germana Gould. 



Helix germana Gould, U. S. Expl. Exp., Moll., p. 70, fig. 40, a-c, 1852. 

 Stenotrema germanum (Gould) Binney, Man. Am. Landsh., p. 114, fig. 82, 

 1885. 



Range. — Northern California, through the Puget Sound region to 



British Columbia. 



