BULIMULUS-NAESIOTUS. 109 



p. 295, 1887. B. eschariferus var. bizonalis ANCEY, op. cit., p. 295, 

 1887. B. eschariferus var. subconoidalis ANCEY, op. cit., p. 295, 

 1887. 



This species is lighter colored than B. perspectives Pfr., with nar- 

 row umbilical perforation, although often rather broadly excavated 

 behind the coluraellar lip, and the body-whorl does not hang sack- 

 like below. Ball writes : " Though this species, as usually received, 

 is apparently smooth and polished, it has minute more or less gran- 

 ular spirals, which it is probable in the young state bear hairs." 



Var. pileatus Dall. 



"Among the living specimens obtained at Chatham Island by the 

 U. S. Fish Commission were some rather smaller than the average 

 and covered with a dense brown epidermis, which bears numerous 

 spiral lines more or less minutely granulose, a small hair or process 

 of the epidermis projecting from each granule, giving the shell a 

 pilose appearance. These specimens measure about 12 mm. in length 

 and 5 mm. in diameter, the color of the shell is browner than in the 

 type, and, when denuded of the periostracum, the shell is seen to be 

 marked by numerous fine sharp, almost microscopic spirals. It 

 may, perhaps, form a variety pileatus, of the typical eschariferus." 



Var. ventrosus Keibisch. PI. 22, figs. 14, 15. 



Shell widely rimate, oblong-oval, thin, shining, arcuately striate r 

 marked with slender granulose spiral lines ; pale yellowish with an 

 encircling paler band ; spire rather acute, suture plicose-margined ; 

 whorls 6I-7J, convex, the embryonal ribbed, last two inflated ; col- 

 umella nearly straight. Aperture oblique, protracted, oval, glossy 

 inside ; peristome simple, the ends joined by a thin callus, right mar- 

 gin rounded, expanded, columellar margin reflexed, spreading. 

 (Reibiscli). 



Alt. 17*5, diam. 8*3, length of aperture 7*5 mill. 



Alt. 16'8, diam. 7*3, length of aperture 6'6 mill. 



Barrington Island, common (Wolf, fide Reibisch, also Dr. G. 

 Baur, who found it under stones near the shore). 



Bulimulus (Ncesiotus) ventrosus REIBISCH, Isis, 1892, p. 19, 1. 1, fig. 

 12 a-b. Bulimulus (Ncesiotus) eschariferus var. ventrosus Reibisch, 

 DALL, Proc. A. N. S., Phila., 1896, p. 434, pi. 17, f. 3 (dentition). 



