CYCLOPHORID 2. 167 
Cyclostoma lamellosum, Adams, in Ann. Lyc. New Vork. v. n. 2, 
p. 54; et Contrib. to Conch. n. 8, p. 138. 
Cyclostomus lamellosus, Pfr. Consp. n. 348; Pneum. Mon. p. 238. 
Hab. Jamaica. 
79. CYcLOSTOMUS RUGULOSUS. B. M. 
Shell subperforate, cylindrically turreted, truncated, thin, wrinkled 
with close-set longitudinal ribs, diaphanous, grayish-white; 
whorls remaining 4, convex, increasing slowly, minutely toothed 
along the slightly-channelled suture, the last one somewhat de- 
tached, joined to the penultimate whorl behind the aperture by 
a broad dentiform callus, obsoletely spirally grooved beneath ; 
aperture perpendicular, obliquely ovate; peristome double; 
inner edge straight ; outer edge almost equally expanded all 
round. Operculum testaceous, of four volutions, the margin of 
which is slightly raised. Length 10-11, breadth 4-5 mill. 
Cyclostoma rugulosum, Pfr. in Wiegm. Arch. 1839, i. p. 356; Ie. 
uy 120) p. 117, t. 14, f 9-11, +. 38, £. 11, 12. 
Cyclostoma clathratum, Gould, in Bost. Journ. iv. 1, 1842. 
Cistula rugulosa, Gray, Cat. Cycl. p. 59, n. 10. 
Cyclostomus rugulosus, Pfr. Consp. n. 349; Pneum. Mon. p. 238. 
Hab. Cuba. 
80. CycLostomus WILKINSONII. 
Shell subperforate, cylindrically turreted, truncated, thin, closely 
sculptured with longitudinal ribs, diaphanous, whitish, with ob- 
solete series of reddish-brown dots; suture lamellarly toothed; 
whorls remaining 4, convex, increasing slowly, the last one de- 
tached, descending, keeled above, grooved spirally on the side 
of the columella; aperture rather perpendicular, ovate ; peri- 
stome double; inner edge scarcely prominent ; outer edge shortly 
reflected all round. Operculum similar to that of C. rugosus. 
Length 8, breadth 3} mill. 
Cyclostoma Wilkinsonii, Adams, Contrib. to Conch. p.6; Pfr. Ic. 
n. 376, t. 46, f. 17-19. 
Cyclostomus Wilkinsoni, Adams, Catal. Jam. Apr. 1851. 
Cyclostomus Wilkinsoni, Pfr. Consp. n. 350; Pneum. Mon. p. 239. 
B. Smaller; uniformly white, with 33 whorls, the last of which is 
less detached; length 6, breadth 3 mill. 
Cyclostoma modestum, Adams, Contrib. to Conch. p. 6. 
Hab. Jamaica. 
