114 CATALOGUE OF PHANEROPNEUMONA. 
Cyclostoma Hillianum, Adams, in Proc. Bost. Soc. 1845, p. 11; 
Pfr. Ic. t. 10, f. 6-8 (scabriculum). 
Choanopoma Hillianum, Pfr. in Z. f. M. 1847, p. 107, n. 12; 
Gray, Cat. Cycl. p. 52, n. 21; Pfr. Consp. n. 233; Pneum. Mon. 
p. 161. 
8. White, girdled with brown, last whorl very shortly detached 
anteriorly. 
Cyclostoma amandum, Adams, Contr. to Conch. p. 3. 
y. Last whorl more widely detached. 
Cyclostoma aculeosum, Adams, Contr. to Conch. p. 2. 
Hab. Jamaica. 
This species differs from Ch. scabriculum by its more depressed 
shape, regular decussation, umbilicus, and operculum. 
12. CHOANOPOMA SPINULOSUM. 
Shell globose-conical, rather thin, dirty white, irregularly striped 
and rather banded with brown, trelliced by close-set blunt 
spiral ridges and more crowded sharp longitudinal ribs; spire 
conical, usually truncate ; whorls (including the apex) 5, very 
convex, enlarging gradually, the last one cylindrical, shortly 
detached anteriorly ; umbilicus middle-sized, pervious ; aperture 
circular, parallel with the axis; peristome double; inner edge 
produced, striate; outer edge shortly reflected, radiately folded, 
slightly auriculate above. Height 11, greatest breadth 14, 
least br. 11 mill. 
Cyclostoma spinulosum, Adams, Contr. to Conch. p. 1. 
Choanopoma spinulosum, Pfr. Consp. n. 234; Pneum. Mon. p. 162. 
Hab. Jamaica. 
13. CHOANOPOMA MITE. 
Shell turbinate-globose, shortly truncate, decussated by blunt 
spiral ridges and very crowded membranous ribs, not coarse, 
uniformly horn-coloured-whitish; spire convex, short ; whorls 
remaining 32, convex, the last one cylindrical, more distinctly 
spirally ridged round the middle-sized, pervious umbilicus ; 
aperture perpendicular, circular ; peristome double ; inner edge 
scarcely prominent; outer edge equally dilated and expanded 
all round, obsoletely waved, concentrically striate, rather an- 
gulated above and slightly emarginate on the penultimate whorl. 
Height 9, greatest breadth 13, least br. 10 mill. 
Cyclostoma mite, Pfr. in Proc. Z. S. 1851; Ic. n. 332, t. 42, 
f7,.8 
Choanopoma mite, Pfr. Consp. nu. 235, p. 59; Pnewm. Mon. p. 163. 
Hab. Jamaica. 
