%"9;^''] PROCKKDINGS OF THE NATIoNAL MUSEUM. 645 



with others by several writers, but is dearly a distinct and well char- 

 acterized form, and is the type oi' Leptohyrsiis, ao(;ording" to the authors 

 of that name. The s])ecies is noticeable for the oily jjloss of its sur- 

 face. The lamina is usually visible with dilliculty or not at all from 

 the aperture; "the prominent tooth wiiuling inward from the columella," 

 mentioned by Dr. ( 'oopei,* is the fold on the })illar and not the lamina, 

 which last he does not seem to have observed or differentiated. 



The nucleus hardly differs from that of inscendenSj the shoulder of it 

 is rounded, not anjuuhir, and the si)iral stria' are faint. The color of the 

 shell is moni brownish and less livid than in excelsiis, tlm pale streaks, 

 though frequently present, are less consjiicuous, and the whitish edge 

 of the whorl in front of the suture is less constant. The shell is the 

 thinnest of all the spe(;ies. It varies in form much like the othfj-s. 



Bulimulus (Leptobyrsus) Eryanti (Cooper) Diill. //. hisccHdeus linjanti Cp. oj). cif,., 

 )). 101, PI. XIII, Jigs. 1 a-c, W.VA. 



"On dry mountains, SOO to 1,000 feet high, climbing high copal trees, 

 northward from Cape St. Lucas, through a distance; of 350 mih;s." Xan- 

 tus, San Jose del Cabo, Bryant. (Plate lxxi. Figs. 3, 4.) 



Usually Avhite, but Avhen living or fresh, pale-brown, showing hardly 

 any si)iral seuli)ture. Nucleus as in the last species. Lamina extraord- 

 inarily thick and rounded, not visible from flic aperture. Surfaccnearly 

 smooth but not polished; retiection of the peristome narrow and feeble. 



This was referred to inscendens as a variety, but appears to be near- 

 est to Hinrifer and a well-defined species. 



Bulimulus (Leptobyrsus) Veseyianus Dal), up. nov. 



Ivspiritu Santo Id., (Inlf of California. l>elding. (Plate Lxxi, Figs. 

 4,5.) 



Shell stout, inflated, brownisli, polished, with seven whorls; suture 

 api)ressed,distinct, but shallow; nucleus worn in all the s^ieci mens but ap- 

 parently notdifferingfrom that of i^.^rj/awti except as being more blunt; 

 whorls excei)t the last rather rounded, the last whorl somewhat flat- 

 tened at the periphery ; umbilicus huge but narrow, overshadowed by a 

 very wide expansion of the pillar-lip ; aperture large, the lips approxima- 

 ted behind, the reflection wide and greatly recuirved, of a livid waxen 

 ])assing into white at the margin; !)ody moderately callous, pillar stiaight 

 with an obs(;ure fold visible at the aperture, internally with a large 

 thick sublingiiiform lamina; surface of the shell like that of B. cxcelsns, 

 but more polished. Lon. of shell, 30.5; of last wlnn-l, 25; of ai)erture, 

 including the lip, 20; maximum diameter of shell, 20; of aperture, 15 mm. 



This species is named in honor of Mr. .1. Xantus d<; V(;sey, to whom 

 we owe much of our knowledge of the fauna of Lower California. It 

 is recognizable by its short, stout shape, widely reflected recurved 

 peristome, very narrow si)ace between the commissures of the lips and 

 body, and large subtriangular lamina. Five specimens, all very uniform, 

 were collected by Mr. Belding (Mus. Reg., 34122) some ten years ago. 



*Proc. Cul. Acad. Sci.. 2m<1 series, Vol. iii, p. 211, 1892. 



