994 CATALOGUE OF PHANEROPNEUMONA. 
ones convex, the two last rather convex above, furnished with a 
single ridge, the last one convex beneath, keeled on the peri- 
phery, marked with three ridges beneath, the keel and the 
umbilicar ridge being crenulate ; aperture very oblique, nearly 
circular, slightly angulated above; peristome thin, sharp, with 
the columellar margin slightly expanded; umbilicus middle- 
sized, deep, showing more than one whorl. Operculum? Height 
4, greatest breadth 6, least br. 5 mill. (Bens.) 
Cyclostoma cuspidatum, Benson, in Ann. and Mag. N. H. viii. 
p- 189; Pfr. Consp. n. 466; Pneum. Mon. p. 3138; Le. n. 407, 
t. 49, f. 21-23. 
Hab. The Neilgherries Mountains (Jerdon). 
2. CycLOSTOMA ? MARGINATUM, 
Shell white, subovate, wrinkled, perforate, with the whorls trans- 
versely marginated and striated. (Chemn.) 
Turbo marginatus, Chemn. Conch. ix. 2, p. 60, t. 123, f. 1075, a. B. 
Turbo limbatus, Gmel. Syst. p. 3606, n. 105. 
Cyclostoma murrhinum, Menke, Synops. ed. il. p. 39. 
Cyclostoma marginatum, Pfr. Consp. n. 467; Pneum. Mon. p. 313. 
Hab. Coromandel. 
3. CycLosToMA ? PATERA. 
Shell rather solid, discoidal, sculptured alternately with broad 
granulated and linear ridges, covered with an olivaceous-fuscous 
periostraca; spire flat; suture slightly channelled; whorls 43, 
rather flattened, the last one furnished, on the periphery, with 
thread-like keels, separated by a furrow, convex beneath, slightly 
angulated round the very broad, bowl-shaped umbilicus; aper- 
ture perpendicular, roundish, somewhat angular; peristome 
simple, straight, with the margins approximate. Operculum ? 
Height 24, greatest breadth 10, least br. 8 mill. 
Cyclostoma patera, Pfr. in Proc. Z S. 1851; Jc. n. 350, t. 43, 
f, 23-25; Consp. n. 468, p. 72; Pneum. Mon. p. 314. 
Locality unknown. 
4, CycLOSTOMA SARRITUM. 
Shell subperforate, ovate-conic, furnished with numerous spiral 
lines, which are separated by narrow grooves, ferruginous- 
whitish, with the apex blunt, reddish; suture well impressed ; 
whorls 4, very convex ; aperture scarcely oblique, ovate, forming 
# of the total length; peristome sharp, slightly expanded, with 
the margins distant, joined by callus, columellar margin an- 
gulated above. Length 2, breadth 17 mill. (ens.) 
