198 CERION, GROUP IV. 



A very small form, which Pfeiffer subsequently reduced to varietal 

 place under cyclostoma, remarking that intermediate forms exist. 

 The original description and figures are given. 



C. PINERIA Ball. PL 32, fig. 20. 



Shell small, whitish, obliquely mottled with pale brownish flam- 

 mules, sometimes nearly all brownish, with about eight whorls; 

 nucleus smooth, brownish, of a whorl and a half, followed by fine, 

 narrow, oblique, subequal riblets crossing the whorl, with about equal 

 interspaces ; apex dome-shaped ; body of the shell subcylindrical, 

 base slightly attenuated, with no umbilicus; aperture rounded, ex- 

 cept over the body, with a thick, white, well-reflected lip, parietal 

 and pillar lips each with a low median tubercle or tooth. Length 

 14, diam. 6.5 mill. (Dall). 



Isle of Pines (Johnson). 



Cerion (Maynardid) pineria DALL, Proc. U. S. Nat. Mus., 1895, 

 p. 6. 



" This is nearest related to Pupa cyclostoma Kiister, but is small 

 and easily distinguished by its finer, closer, and more even ribbing. 

 Like all the species of its genus it is variable, and has among others 

 a small variety with very regular ribbing, which hardly exceeds 10 

 mill, in length, and is doubtless the smallest form belonging to the 

 genus which has yet been reported." 



Some specimens are a little larger, 15x6 to 15x7 mill. There 

 are 42 to 45 riblets on the penult, whorl, and usually the corneous- 

 brown stripes pass over both ribs and intervals. The parietal lamella 

 is very small, 1 to 1J mill, long, and the parietal callus moderately 

 thick, but somewhat transparent. The specimen figured is one of 

 the original lot. 



C. CUMINGIANUM (Pfeiffer). PI. 32, fig. 25. 



Shell deeply rimate, ovate-oblong, rather solid, irregularly hair- 

 striate; white, somewhat tessellated above with brownish-corneous 

 spots. Spire convex, attenuated above, the apex corneous, rather 

 acute, suture linear. Whorls 9, nearly flat, the last a little exceed- 

 ing one-third the total length, ascending in front, the base somewhat 

 compressed near the umbilical chink. Columella deeply dentate- 

 plicate, the parietal wall provided with a moderate sized entering 

 fold. Aperture vertical, truncate-oval ; peristome callous, narrowly 



