CYCLOPHORID. 161 
the axis ; peristome rather simple, with the inner edge scarcely 
a little expanded. Operculum testaceous, flat, larger than the 
aperture, with its margin reflected abruptly far behind the 
margin of the aperture. Length 13, breadth 8 mill. 
Cyclostoma tectilabre, Adams, Contrib. to Conch. p.10; Pfr. Lc. 
n. 354, t. 44, f. 25-27. 
Cyclostomus tectilabris, Pfr. Consp. 335; Pneum. Mon. p. 237. 
Hab. Jamaica. 
65. CycLosTomus ? SACCATUS. 
Shell deeply rimate, scarcely perforate, ovate-oblong, shortly trun- 
cate, thin, closely sculptured with thread-like longitudinal ribs, 
diaphanous, pale horn-coloured, painted with chestnut-coloured 
spots, arranged into bands; suture deep, spinulous under a 
lens: whorls remaining 34, convex, the last somewhat ascend- 
ing and shortly detached anteriorly, bag-shaped beneath ; aper- 
ture nearly circular, its base proceeding beyond the axis ; peri- 
stome simple, continuous, scarcely a little expanded. Opercu- 
lum? Length 12, breadth 8 mill. 
Cyclostoma saccatum, Pfr. in Proc. Zool. Soc. 1851; Je. n. 352, 
t. 43, f. 33, 34. 
Cyclostomus? saccatus, Pfr. Consp. n. 336, p. 64; Pneum. Lon. 
p- 230. 
Locality unknown. 
66. CycLostomuS ? DISSECTUS. 
Shell perforate, oblong, rather solid, sculptured with numerous 
concentric ridges and very close-set longitudinal striz, whitish 
or flesh-coloured; spire truncate; whorls remaining 4, mode- 
rately convex, the last one detached anteriorly, keeled above; 
aperture nearly perpendicular, ovate; peristome continuous, 
straight, blunt, angulated above. Operculum? Length 15, 
breadth 83 mill. 
Cyclostoma dissectum, Sow. Thes. n. 43, p. 105, t. 24, f. 58, 59; 
Pyro ices 163, p.1o2, t. 21, f. 1, 2. 
Cyclostomus dissectus, Gray, Cat. Cycl. p. 47, n. 16; Pfr. Consp. 
n. 337; Pneum. Mon. p. 230. 
Locality unknown. 
67. CycLostomus ? SOLIDUS. 
Shell almost imperforate, nearly cylindrical, solid, whitish, sculp- 
tured with rather distant flattened concentric ribs and very 
crowded longitudinal strie; spire truncate; whorls remaining 
4-, convex, enlarging slowly, the last one scarcely ascending 
anteriorly; aperture perpendicular, ovate; peristome straight, 
. Eee 
