FAMILY LYMN'.«1U,-E 79 



one specimen, but some young sliells 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 surlacc and 

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

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

 have observed. 



Lymnaea (Stagnicola) bulimoides Lea. 



Limniia bulinioidfs Lea, Proc. Am. Phil. Soc, 11, p. 33. 1841 ; Trans. Am. 

 Phil. Soc, IX, p. 9, 1844. — Haluem.\n, Mon. Limn., p. 44, pi. xui, 

 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 ■Kl 



(and northward .?) ^nl 



Oregon ! (Nuttall) Columbia River near Fort Van- ^^ 



couver, Wash. ! Moose Rivci at Moose Factory, Hud- Fig. 62. I.ym- 



• mta bulimoides 



son Bay (Drexler).'' t i-r ■ \ \ 



^ ^ ' Lea. ( lypical. ) 



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 Bull- 

 niuliis fihda. 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 caia- 

 scopium or caperata and not the true bulimoides. 



Lymnaea (Stagnicola) caperata Say. 



Lymneus capcratus Sav, New Harmony Disseminator, 11, p. 230, 1829. 

 Ldmnea capcrala Haldeman, Mon. Limn., p. 34, pL xi, figs. 1-9, 1842. 

 IJmniTa vmHlicata KviMK, Am. Journ. Sci., xxxix, p. 374, 1840; Boston 



Journ. N. Hist, III, p. 325, pi. iii, fig. 14, 1S40. — 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- ^'""y ('''■'''iiagc at IMoose Factory. I feel strong doubts 

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

 entirely heterogeneous. 



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



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

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



