116 Bulletin American Museum of Natural History. [Vol. XXXIV, 
Another species which seems to be long-lived is Goniobasis tenuicarinata 
(Meek & Hayden); a young but characteristic specimen was found by 
Granger and Stein in the Torrejon Formation, East Fork of Torrejon Arroyo, 
New Mexico, in July, 1912. 
Goniobasis cartert Conrad (apparently a valid species) seems to be highly 
characteristic of the Wasatch; it was found both in the typical Knight 
Formation near Evanston, Wyo. (bluff north of railway at Knight Station, 
G. Olsen, June 14, 1906), and at Ojo San José, New Mexico (Stein; July 11, 
1912). So far as we know at present, this shell does not appear before the 
Wasatch, and is therefore likely to be especially valuable for stratigraphical 
purposes. 
Oreohelix megarche C. & H. and Grangerella sinclairi (Ckll.) are the best 
indicators of the Sand Coulee Beds (Lower Eocene). G. sinclacrt is very 
abundant, and comes from three miles east and five miles southeast of mouth 
of Pat O’Hara Creek, and from the head of Big Sand Coulee, all in Clark’s 
Fork Basin, Wyo. (Granger and Stein). O. megarche is also common at the 
various localities, but occurs also in the Wasatch of Big Horn Basin. 
TERRESTRIAL SPECIES. 
Grangerella n. g. (Bulimulide.) — 
Shell conic-subglobose, with about seven whorls; spire obtuse, sutures 
scarcely impressed; body-whorl broadly rounded, not at all keeled or 
angulate; umbilicus small but distinct; sculpture consisting of fine oblique 
‘riblets, about 6 to a mm. a short distance before the aperture. The last 
whorl broadens and is deflected upwards at the end, and the wide aperture 
is directed obliquely upwards, having about the same direction as the outer 
side of the shell; the thick lip, surrounding the aperture, has its upper angle 
produced, and actually extending a little above the level of the apex of the 
spire, while the lower inner corner extends a little below the periphery of the 
last whorl. Whether there are teeth in the aperture cannot be ascertained. 
There is no constriction on the outer side of the last whorl. | 
Grangerella megastoma n. sp. 
Alt. 9 mm.; diam., max. 14, min. 9.75.mm.; aperture (outside measurement), 
long. 8, lat. 6 mm. 
Sand Coulee Beds (Eocene); head of Big Sand Coulee, Clark’s Fork Basin, 
Wyoming; Sept. 6 to 7, 1912 (W. Granger). 
