*234 CERION, GROUP VIII. 



excavated area behind the columellar lip. It is closely related to 

 C. regina. 



C. CALCAREUM (Pfeiffer). PI. 34, figs. 1, 2. 



Shell deeply rimate, subcylindric, solid ; irregularly striate, glossy, 

 calcareous ; spire long, the apex obtusely conic. Whorls 12, nearly 

 flat, the last inflated, wrinkle-plicate in front, ascending. Columella 

 simple. Aperture semi-oval, white within, brownish in the throat ;. 

 peristome strongly thickened, expanded throughout, white, the mar- 

 gins joined by a glossy callus, columellar margin sinuate-reflexed 

 above. Length 38, diam. 12 mill.; aperture with peristome 14 mill, 

 long, 12 wide (Pfr.). 



Habitat unknown (Pfr.) ; Little Inagua (Sargent). 



Pupa calcarea PFR., Zeitschr. f. Malak. 1847, p. 83 ; Monogr. 



ii, p. 315 KCSTER, Conchyl. Cab., p. 157, pi. 19, f. 4, 5 



Strophia calcarea Pfr., BLAND, Ann. Lye. of Nat. Hist, of N. Y., 

 xi, p. 85. 



Close to C. sarcostomum, which may prove to be a ribbed form of 

 the same species. Bland is responsible for the identification of 

 specimens collected by Mr. D. Sargent on Little Inagua, thus giving 

 a locality for the species, before of unknown habitat. I have not 

 seen specimens. 



C. SARCOSTOMUM Pilsbry & Vanatta. PI. 34, figs, 3, 4. 



Shell solid and strong, subcylindrical, or slightly wider below - r 

 white or whitish pink. Whorls 11 to 11^, slightly convex, the 

 earlier 6 forming a convexly tapering cone with extremely obtuse 

 apex, almost dome-shaped at top ; passing gradually into the cylin- 

 drical portion of shell, which consists of 5 to 6 whorls. Sculpture of 

 somewhat irregular and unequal, straight ribs, about as wide as the 

 intervals, about 25-30 on the last whorl. These ribs are strongly 

 developed on the cylindrical portion of the shell, but the cone is very 

 densely, finely and sharply striated, the earliest whorl only being 

 smooth. 



Aperture small, less than one-third the total length of shell, pink- 

 ish-flesh colored in the throat; peristome well reflexed, recurved, 

 more or less thickened on the inner edge of the face ; parietal callus 

 thick and heavy. Parietal lamella rather strong and moderately 

 long ; axial fold moderately conspicuous. 



