148 CATALOGUE OF PHANEROPNEUMONA. 
35. CYCLOSTOMUS CITRINUS. B. M. 
Shell globose-turbinate, rather solid, crowdedly and slightly spi- 
rally striate above, rather shining, white or yellowish; spire 
turbinate, rather blunt; whorls 6, convex, the last one smooth 
on the periphery, closely spirally furrowed round the funnel- 
shaped umbilicus ; aperture somewhat oblique, circular ; peristome 
expanded and reflexed, with the margins approximate, joined 
by a lunarly-indented callus, right margin slightly simuate 
above. Height 21, greatest breadth 32, least br. 26 mill. 
Cyclostoma citrinum, Sow. Thes. n. 76, p. 117, t. 25, f. 104; Pfr. Le. 
n. 170, p. 157, t. 21, f. 22 (copied). 
? Tropidophora citrina, Gray, Cat. Cycl. p. 41, n. 11. 
Cyclostomus citrinus, P/r. Consp. n. 807; Pnewm. Mon. p. 211. 
8. Smaller; more distinctly decussated above. 
Cyclostoma rugosum, Sow. Thes. n. 87, p. 121, t. 26, f. 1238. (Not 
Lam.) 
Cyclostoma semidecussatum, Pfr. in Z. f. WM. 1847, p. 106, n. 65; 
Te. n. 168, p. 156, t. 21, f. 17-19. 
Hab. Trinidad. 
36. CYCLOSTOMUS XANTHOCHILUS. 
Shell globose-conical, solid, irregularly.and faintly striate, somewhat 
shining, grayish-fulvous, indistinctly striped and banded with 
brown; spire turbinate, rather pointed; whorls 6, convex, last 
rounded, rather flattened beneath; umbilicus narrow, scarcely 
pervious ; aperture nearly perpendicular, rather circular, shining 
blackish within ; peristome shortly interrupted, shortly expanded 
all round, fuscous-orange-coloured, with the margins joined by 
a short slightly-indented callus. Height 20, greatest breadth 
27, least br. 21 mill. 
Cyclostoma xanthocheilus, Sow. Thes. Suppl. n. 179, p. 158%, t. 31, 
A. f. 294, 295. 
Cyclostoma xanthochilum, Pfr. Je. n. 233, t. 34, f. 5, 6. 
Cyclostomus xanthochilus, Pfr. Consp. n. 308; Preum. Mon. p. 211. 
flab. Madagascar. 
37. CycLostomus SowERBYI. B. M. 
Shell globose-conoidal, rather solid, slightly decussated above by 
very close-set distinct strie of growth and raised spiral lines, 
cinnamon-coloured, yellowish towards the apex, with the upper 
ridges chestnut-coloured, articulated with white ; spire conoidal, 
rather blunt; whorls 5, convex, the last one violaceous ante- 
riorly, rather smooth, and marked with a single chestnut- 
coloured band below the periphery; umbilicus middle-sized ; 
