FAMILY LIMACID^E 45 



Pristiloma? arctica Lehnert. 



Hyalina arctica. LEHNERT, Science Record, n, p. 172, June 16, 1884. 

 f Conulus arcticus DALL, in Pilsbry, Proc. Acad. Nat. Sci. Phila. , for 1 899, p. 1 87. 

 ? Pristiloma arctica PILSBRY, Proc. Acad. Nat. Sci. Phila., for 1899, p. 186, 

 pi. ix, figs. 3, 4, 5. 



Range. Yakutat Bay, Alaska, to Point Barrow. 



Point Barrow, Lat. 71 25' N. ! Unalaska ! Coal Harbor, Unga 

 Island, Shumagins ! Orca, Prince William Sound ! and Yakutat Bay, 

 Alaska ! 



This may prove to be a depressed Euconulus when the animal is 

 anatomically examined. 



The species was formerly confused with P. stearnsii. It occurs 

 in the moss of the tundra near Point Barrow, where at most it can 

 have but three months of activity out of the whole year. 



Family LIMACIIXffi. 



Genus Agriolimax Morch. 



FIG. 31. Agriolimax agrestis L. 



Agriolimax agrestis Linnet 



Limax agrestis LIKNE, Syst. Nat., ed. x, p. 652, 1758. FORBES and HAN- 

 LEY, Brit. Moll., iv, p. 13, pi. DDD, fig. 3, 1853. 



Range. Both coasts of America, introduced from Europe. 

 Victoria, B. C. ! Manitoba ; Ungava ! 



Agriolimax hyperboreus Westerlund. 



Limax hyperboreus WESTERLUND, Land och Sotv. Moll. Sibiriens, p. 21, 1876. 



BINNEY, Man. Am. Landsh., p. 473, fig. 416, 1885; Bull. Mus. 



Comp. Zool., xin, No. 2, p. 42, 1886 ; xix, No. 4, p. 205, fig., pi. vm, 



fig. F, 1890. 

 Limax (Agriolimax) hyperboreus DALL, Proc. U. S. Nat. Mus., for 1886, p. 



202, Oct., 1886. 



Range. The Arctic and boreal regions of both hemispheres. 



Bering Id. ! Kamchatka ! Chukchi Peninsula ! Alaska at Norton 

 Sound ! Nushagak ! Unalaska ! Coal Harbor, Shumagins ! St. Paul 

 Island, Bering Sea ! Kadiak Island ! Sitka ! and Cape Fox ! In Van- 

 couver Island at Comox ; Seattle, Wash. ; Alberta at Laggan, altitude 

 5, 200 feet; Manitoba; Ungava, Labrador ! 



This little black slug is the prevalent and almost the only animal of 

 its kind in the higher latitudes of North America. It has been referred 



