OF CONCIIOLOGY, 51 



nated, deeply and widely umbilicated, liorn-colored, spire flat- 

 tened, terraced, last whirl triangular, strongly carinated above ; 

 aperture small, wide above, narrowed, acute below; inner lip 

 Avith a tliin callus ; outer lip simple, sinuous, angular. 



In the catalogue of North American Pulmonates, published 

 by the Smithsonian Institution, December 9th, 1863, I pro- 

 posed the generic name Gariw'fex^ for a shell described as Planor- 

 bis newherryi, Lea, (Proceedings Philadelphia Academy Natural 

 Sciences, 1854, p. 41.) It is somewhat delated to Taj)hius, 

 but has not the excavated upper surface or rounded whirls of 

 that subgenu", and the aperture is below the plane of the 

 whirls. 



Two species of the genus have been described, C. newherryi, 

 and O. bretveri, Newcomb. The latter may prove but a 

 variety of the former. In the Smithsonian Institution's col- 

 lection are specimens from Klamath Lake, Canoe Creek and 

 Clear Lake, California. 

 BuLiNUS Berlandierianus, Binney. — t. 7, f. 8. 



Description. — Shell cylindrical, smooth, whitened, rather 

 thick ; whirls five, the upper ones narrowly flattened, the 

 lower one comprising more than 15-17 of the whole length 

 of the sliell ; quite compressed ; aperture very long, narrow ; 

 columella simple, with a light callus. 



Length of the shell 17, greatest breadth 8, of aperture 

 length, 14, breadth 4 millimetres. 

 Habitat, Texas, in the region of Metamoras. 



Six specimens Avere presented to the Smithsonian Institution 

 by Gen. Couch, among the shells collected by Berlandiere. 



This species resembles Bulinus elatus, Gld., more than any 

 other known to inhabit North America. But that species is 

 very much thinner and delicate, has a longer, more pointed 

 spire, a shorter aperture and more convex body whirl. 



Fig. 9 is drawn from the largest American specimen of the 

 widely distributed Bulinus hypnorum. It shows how slight is 

 the resemblance to that species in B. berlandierianus. 



* Subsequently, fJanuary, 1^04,) Mr. lea proposed the generic name 

 Megasijstropha for the same shell. (Proceedings Philadelphia Academy, 

 18154, p. 5;. 



