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. 



Limncea bulimoides Lea, Proc. Am. Phil. Soc, II, p. 33, 1 841 ; Trans. Am. 

 Phil. Soc, ix, p. 9, 1844. — Haldeman, Mon. Limn., p. 44, pi. xm, 

 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 Factory, Hud- G " 2 ' • y .'" 



J ncea bulimoides 



son Bay (Drexler) ? Lea (Tjpical . } 



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 Btdi- 

 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, 11, p. 230, 1829. 

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

 Limncea umbilicata Adams, Am. Journ. Sci., xxxix, p. 374, 1840; Boston 



Journ. N. Hist., in, p. 325, pi. in, 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 61. Lym- Bay drainage at Moose Factory. I feel strong doubts 

 ncea 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 



