FAMILY LYMN^EID/E 79 



one specimen, but some young shells from Sonoma Co., Calif., col- 

 lected by Hemphill, may belong to it. The latter are proportionally 

 stouter and are of a pale straw color. The polish of the surface and 

 the straight pillar are alike in both, yet I hesitate to unite them. No 

 other American species has an equally polished surface so far as I 

 have observed. 



Lymnaea (Stagnicola) bulimoides Lea. 



Limnaa bulimoides LEA, Proc. Am. Phil. Soc., 11, p. 33, 1841 ; Trans. Am. 

 Phil. Soc., ix, p. 9, 1844. HALDEMAN, Mon. Limn., p. 44, pi. xiu, 

 figs. 9, 10, 1842. BINNEY, op. cit., p. 61, fig. 96, 1865 (Oregon). 



Range. Oregon, California, Texas, New Mexico, 

 Dakota, the United States west of the Mississippi 

 (and northward?) 



Oregon ! (Nuttall) Columbia River near Fort Van- 

 couver, Wash. ! Moose Rivei at Moose Factorv, Hud- 



ncea bulimoides 

 son Bay (Drexler) ? Lea (Tvpical .) 



This species has been generally confounded with L. 

 techella Haldeman, which seems to be distinct, having a more stumpy 

 form and larger umbilicus, recalling, as Binney observes, his Buli- 

 mulus pilula. According to Lea's types, very few of the localities 

 cited for this species, away from the Pacific Coast, are reliable. I sus- 

 pect the shell from Hudson Bay, collected by Drexler, is a young cata- 

 scopium or caperata and not the true bulimoides. 



Lymnaea (Stagnicola) caperata Say. 



Lymneus caperatus SAY, New Harmony Disseminator, II, p. 230, 1829. 

 Limnea caperata HALDEMAX, Mon. Limn., p. 34, pi. xi, figs. 1-9, 1842. 

 Limnasa umbilicata ADAMS, Am. Journ. Sci., xxxix, p. 374, 1840; Boston 



Journ. N. Hist., HI. p. 325, pi. HI. fig. 14, 1840. GOULD, Inv. Mass., 



p. 218, fig. 149, 1841. 



Range. Northern United States, west to the 

 Rocky Mountains and northward. 



Manitoba ; at Pine Creek, Pembina, and Lake Win- 

 nipeg. Alberta ; at Red Deer and McLeod. The 

 lower Saskatchewan near Lake Winnipeg. Hudson 

 FIG. 63. Lym- Bay drainage at Moose Factory. I feel strong doubts 

 naa caperata. as to the validity of this species, which may prove 

 entirely heterogeneous. 



Lymnaea (Stagnicola) anticostiana n. sp. Plate n, figs. 4, 5. 



Shell acute, slender, with a blunt reddish nucleus and seven well- 

 rounded whorls ; suture deep, the whorls slowly enlarging ; the last 



