CYCLOPHORID lig 
Oyclostoma Chittyi, Adams, Contr. to Conch. p. 1, 89; Pfr. Le. 
n. 374, t. 46, £13, 14. 
Choanopoma Chittyi, Pfr. Consp. n. 231; Pnewm. Mon. p. 160. 
Hab. Jamaica. 
This species differs from Ch. fimbriatulum by its spiral ridges, 
much more erowded, rendering the surface coarse, by the pro- 
duced inner peristome, and principally by its operculum. 
10, CHOANOPOMA SCABRICULUM. B. M. 
Shell conoidally-globose, scarcely truncate, thin, roughly trelliced 
by close-set spiral ridges and more crowded longitudinal lines, 
fulvous-whitish, sometimes girdled with obsolete reddish-brown 
lines; spire convex; whorls remaining 4—44, rounded, enlarging 
gradually, the last cylindrical, more distinctly and distantly 
spirally furrowed in the umbilicus, which is middle-sized, 
rather compressed, scarcely pervious ; aperture perpendicular, 
circular ; peristome double; inner edge short; outer edge thin, 
broadly expanded all round, sinuate and auriculate above, emar- 
ginate on the penultimate whorl, imbricately striate concentri- 
cally, wavingly folded, and marked with brown rays. Operculum 
with 4 whorls, the outer edge of which is highly raised, ex- 
panded above, outer whorl very broad. Height 11, greatest 
breadth 17, least br. 12 mill. 
Cyclostoma scabriculum, Sow. Thes. n. 119, p. 183, t. 28, f. 147 ; 
Pfr. Ie. (a. 71, p. 77, part.) n. 375, t. 46, f. 15, 16. 
Cyclostoma amabile, Adams, Contrib. to Conch. p. 2. 
Choanopoma scabriculum, Pfr. in Z f. MW. 1847, p. 107, n. 8; 
Gray, Cat. Cyel. p. 50, n. 4; Pfr. Consp. n. 232; Pneum. Mon. 
p. 160. 
Hab. Jamaica. 
11. CHoanopoma Hin.ranum. 
Shell globose-conoidal, thin, regularly trelliced by crowded spiral 
and longitudinal ridges, coarse, fulvous-whitish, with interrupted 
reddish-brown bands or lines ; spire convexly-conoidal, scarcely 
truncate; whorls remaining 4, moderately convex, the last 
cylindrical, marked with stronger spiral ridges round the um- 
bilicus, which is middle-sized, regular and open; aperture 
nearly perpendicular, circular; peristome double; inner edge 
scarcely prominent, slightly expanded; outer edge broad, an- 
gularly expanded, radiatingly folded, marked with brownish 
rays, sinuate and auriculate above, emarginate on the penulti- 
mate whorl. Operculum with 4 gradually-increasing volutions, 
the outer edge of which is highly raised, and angularly reflected 
above. Height 10, greatest breadth 15, least br. 114 mill. 
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