2 4 



LAND AND FRESH WATER MOLLUSKS 



Pyramid Island, Lynn Canal, Alaska, jide Reinhardt. 



This form, collected by Dr. Krause, was identified by Dr. Rein- 

 hardt with Nevill's species and is included here solely on his authority, 

 as I have not seen specimens. 



Genus Polygyra Say. 

 Polygyra devia Gould. 



Helix devia Gould, Proc. Boston Soc. Nat. Hist., n, p. 165, 1846. — Binney, 



Land and Fw. Sh. N. Am., 1, p. 152, fig. 259, 1869. 

 Helix baskervillei Pfeiffer, Proc. Zool. Soc. London, p. 130, 1849. — Reeve, 



Conch. Icon., Helix, fig. 684, 1852. 

 Polygyra devia Pilsbry, Class. Cat. N. Am. Landsh., p. 11, 1897. 



Range.- — Washington and Idaho, north into British Columbia. 

 Sumas Prairie, B. C. ; Esquimalt, Vancouver Island. 



Polygyra Columbiana Lea. 



Helix columbiana Lea, Trans. Am. Phil. Soc, vi, p. 89, pi. xxni, fig. 75, 



1839. — Binney, Terr. Moll., 11, p. 169, pi. v, 185 1. 

 Helix labiosa Gould, Proc. Boston Soc. Nat. Hist., 11, p. 165, 1846 ; Expl. 



Exp. Moll., p. 67, fig. 35, 1852. 

 Polygyra columbiana Pilsbry, Class. Cat. N. Am. Landsh., p. 11, 1897. 



Range. — Monterey Bay, California, to Yakutat Bay, Alaska, in the 

 moist wooded region west of the Rocky Mountains. 



Mountains of Idaho, western Montana and Washington ; Vancouver 

 Island at Victoria ! Nanaimo and Nootka ; British Columbia mainland 

 on banks of Fraser River (Lord) and Skeena River ! (Osgood) ; Har- 

 bledown and Pender Islands, Johnstone Strait ; Union Bay ! Port 

 Simpson; and Cumshewa Inlet, Queen Charlotte Islands! B. C. ; in 

 Alaska at Cape Fox ! Annette Island, Killisnoo, Sitka ! Lynn Canal ; 

 Biorka Island ! Chilkat valley ! Lituya Bay ! Yakutat ! 



There are several varieties of this widespread and familiar species. 

 First, the type, subconic rather elevated and small, with narrow re- 

 flexed lip. Lea's specimen was decorticated and showed no signs of the 

 hairs with which the shell is usually covered, but this was accidental ; 

 some specimens normally show hardly a trace of the hairs which are 

 usually so conspicuous. The second variety, P. labiosa Gould, is 

 larger, more depressed relatively, with a broader, somewhat flexuous 

 reflected lip. This form is more prevalent in the interior of Washing- 

 ton, Idaho, etc., and more often has a parietal tooth or trace of a tooth. 

 The variety santacruzensis is in form more like the type but much 

 smaller, thin, lighter colored, with a sparser pelage, and about half 

 the specimens have a trace of a parietal tooth, while in a lot of about 

 seven hundred columbiana, from Sitka, I found only one specimen 



