CYCLOPHORIDS. Las 
columellar margin dilated in the middle, slightly reflexed. 
Height 12, greatest breadth 12, least br. 10 mill. 
Cyclostoma Carolinense, Pfr. in Proc. Z. S. 1851; Ic. n. 344, t, 43, 
f. 10-11. 
Cyclostomus Carolinensis, Pfr. Consp. n. 318, p. 63; Pneum. Ion. 
p. 217. 
Hab. The Caroline Islands. 
48. CycLOSTOMUS TENUIS. B. M. 
Shell globose-pyramidal, thin, nearly white, dull; spire rather 
acuminated, but with an obtuse apex; volutions 5—6, rounded, 
slightly spirally striated posteriorly; the last volution with a 
single fulvous band, and smooth in front; suture deep; aperture 
round; peritreme thin, very slightly reflected ; umbilicus mid- 
dling. Length 15, breadth 9 mill. 
Cyclostoma tenue, Sow. Thes. n. 134, p. 138, t. 31, f. 265; Pfr. Le. 
n. 190, p. 174, t. 25, f. 11 (copied). 
Cyclostomus tenuis, Gray, Cat. Cycl. p.44,n.9; Pfr. Consp. n. 319 ; 
Pneum. Mon. p. 218. 
Hab. Africa (Gray, Sowerby). 
49, CycLOSTOMUS CINCINNUS. B. M. 
Shell conical, thin, slightly sculptured with crowded spiral ridges, 
uniformly white or marked with a single fuscous line below the 
periphery; spire conical, with the apex rather blunt; whorls 4, 
convex, the last one nearly smooth in the middle, crowdedly 
grooved beneath round the narrow scarcely pervious umbilicus ; 
aperture nearly perpendicular, rather circular ; peristome simple, 
sharp, with the margins almost contiguous; columellar margin 
slightly reflexed. Length 11, breadth 73 mill. 
Cyclostoma cincinnus, Sow. in Proc. Z. S. 1843, p. 60; Thes. n. 32, 
p. 102, t. 24, f. 77, 78; Pfr. Ic. u. 140, p. 134, t. 18, f. 1-3. 
Cyclostoma modestum, Feruss. MSS. in Mus. Brit. 
Cyclostomus cincinnus, Gray, Cat. Cycl. p. 44, n. 8; Pfr. Consp. 
n. 320; Pnewm. Mon. p. 218. 
Hab. Madagascar? (Gray.) 
50. CycLoSTOMUS LIGATULUS. 
Shell oblong-conoidal, thin, umbilicated, subturreted, transversely 
slightly striate, many-banded; spire pointed; whorls 5-6, con- 
vex; aperture obovate; lip sharp, scarcely reflexed. Height 
14-15, breadth 10 mill. 
