GASTROCOPTA, NORTH AMERICA, WEST INDIES. 35 



Fig. 43. West Fairmount Park, near Chamounix, Philadel- 

 phia, Pa. Vanatta. No. 58224. 



Fig. 44. Buckfield, Maine. John A. Allen. No. 58219. 



Fig. 45. Ithaca, New York. No. 62486. 



Figs. 46-48. Upper Red Hook, Duchess Co., New York. 

 W. S. Teator. No. 58218. 



Figs. 49-52. Washington, D. C. E. Lehnert. A. N. S., 

 No. 58225. 



Fig. 53. Drift of Oak Creek, Page's Ranch, Oak Creek, 

 Arizona. E. H. Ashmun. No. 82925. 



6. GASTROCOPTA CARNEGIEI (Sterki). PL 10, fig. 5. 



"Shell minute, ovate-conical with the apex nearly pointed, 

 narrowly umbilicate and short-rimate, colorless whitish; 

 whorls four to four and a half, well rounded with deep suture, 

 the last large, rounded at the base; surface with very slight, 

 irregular striae, apex without striae, microscopically rugulose ; 

 aperture rather large, well rounded, peristome sharp, not 

 everted, with the ends somewhat approximate, palate with a 

 very slight crest close to and parallel with the margin, inside 

 with a very slight callous or none; lamellae and folds: pari- 

 etal rather large, nearly simple, columellar medium, an in- 

 ferior columellar near the base, or wanting; the two prin- 

 cipal palatals. Soft parts not examined. Alt. 1.2, diam. 1 

 mm.; other examples, 1.0 : 0.9" (Sterki). 



Ohio: woods north of Geneva, Ashtabula Co. Type no. 

 1990, Sterki collection of N. A. Pupidaa. 



Bifidaria minuta STERKI, Nautilus, xxix, January, 1916, p. 

 105. Not Pupa minuta "Say", Pfeiffer, 1842, also a Bifi- 

 daria. Bifidaria carnegiei STERKI, Nautilus, xxx, November, 

 1916, p. 84. 



' ' This Bifidaria is near tappaniana Adams, but differs from 

 that species as follows: it is much smaller, more conical, the 

 whorls are less in number, more rapidly increasing, more 

 convex, the last is comparatively larger; there is no callous 

 in the palate or a very slight one, the palatal folds are longer 

 and there are no secondary ones (as supra- and interpalatal). 



"It was a surprise to find a new Bifidaria in this part of 

 the country, and it appears that the (three) specimens on 

 hand represent a distinct species. If not closely examined, 



