1897.] NATURAL SCIENCES OF PHILADELPHIA. 21 



The nepionic whorls, when unworn, show a vertically ribbed 

 sculpture very different from the reticulate apices of the B. exilis 

 group, but like the apex of B. sanctcelucice Smith. The peculiar 

 columella also somewhat resembles that species, which in propor- 

 tions is also quite similar, but the post-nepionic sculpture and dark 

 color of chrysaloides are unlike Smith's form. 



Bulimulus glyptocephalus n. sp. 



Shell narrowly perforated, long ovate, solid and thick, of chalky 

 texture. White or bluish- white, the apical whorl buff, the next 

 bluish below, pale above. Surface irregularly and coarsely wrinkle- 

 striate and conspicuously malleated ; apical whorl with conspicuous, 

 arcuate riblets, becoming closer and beaded on the second whorl. 

 Spire conic, the apex very obtuse, siltures impressed ; whorls 5?, 

 weakly convex, the last suture slightly more descending along the 

 latter half, and consequently a trifle oblique to the others. 



Aperture a trifle exceeding half the total altitude of shell, sub- 

 vertical, white inside, with a faint narrow band at position of the 

 periphery and another wide one above ; outer lip blunt, obtuse, not 

 expanded; columella concave below, straighter above, the columel- 

 lar margin broadly dilated above, reducing the umbilicus to a 

 chink; parietal callus white, rather thin. Alt. 31, diam. 17 mill.; 

 alt. of aperture 15 J mill. 



Peru (A. Agassiz). 



A peculiar form unlike any Peruvian species known to me except 

 the next, in the characters of the earlier whorls. It differs from the 

 following species in its elliptical-ovate shape and larger aperture. 



Bulimulus sarcochrous n. sp. 



Shell narrowly umbilicated, ovate-conic, solid and strong. Fleshy 

 white, becoming flesh-pink and then brownish above, the earlier 2 

 whorls brown below, white above. Surface irregularly, weakly 

 striate, more wrinkled below the sutures, faintly malleated on the 

 body whorl ; apical sculpture as in .the preceding species, except 

 that the riblets are less prominent and are much finer and closer on 

 the second whorl. Spire straightly conic, the apex very obtuse; 

 whorls 5], nearly flat, the last one not more rapidly descending than 

 the rest. 



Aperture ovate, one-half the altitude of shell, vertical, light brown 

 inside, with a faint, narrow light band at position of the periphery,, 

 and white within the lip-edge ; outer lip obtuse and rather thick, not 



