CYCLOPHORIDAL 127 
more distinctly furrowed beneath; aperture little oblique, ovate ; 
peristome thin, with the margins united by callus, right margin 
slightly expanded, emarginate above ; columellay margin dilated 
into a broad expanded lamina, which covers haif of the middle- 
sized umbilicus. Operculum? Height 29, greatest breadth 42, 
least br. 32 mill. 
Cyclostoma auriculare, Gray, in Griff. Cuv. Anim. Kingd. t. 28, f. 5. 
Cyclostoma candidum, Sow. hes. n. 77, p. 117, t. 26, f. 107; Pfr. 
Ic. n. 187, p. 172, t. 25, f. 6 (from Sowerby). 
Cyclophora auricularis, Swains. Malac. p. 336. 
Otopoma auriculare, Gray, Cat. Cycl. p.36,n.4; Pfr. Consp.n. 261 ; 
Prneum. Mon. p. 180. 
Locality unknown. 
3. OTOPOMA ALBICANS. 
Shell depressed-globose, smooth, indistinctly marked with spiral 
and oblique striz, rather shining, white; spire broadly conoidal, 
blent; whorls 5, convex, the upper ones distinctly furrowed 
concentrically, the last one descending anteriorly, rather ven- 
tricose; aperture slightly oblique, ovate; peristome continuous, 
shortly affixed, thickened and expanded, right margin arcuately 
dilated; columellar margin angularly produced near the um- 
bilicus, which is wide and somewhat tunnel-shaped. Height 23, 
greatest breadth 35, least br. 29 mill. 
Cyclostoma albicans, Sow. Spec. Conch. 11. Cycl. £.104,105; Sow. in 
Zool. of Beech. Voy. p. 146, t. 38, f. 30; Sow. Thes. n. 79, p. 118, 
t. 26, £. 110-112; Pyr. Ic. n. 83, p. 87, t. 11, f. 13, 14, 
Otopoma albicans, Gray, Cat. Cycl. p. 36, n. 5; Pfr. Consp. n. 262; 
Pneum. Mon. p. 181. 
Hab. The Island of Hainan, South China (Benson). 
4, OTOPOMA NATICOIDES. B. M. 
Shell conoidally-globose, solid, thick, rose-coloured-whitish; spire 
conoidal, rather blunt; whorls 53, convex, the upper ones 
minutely decussated, the last one ciosely wrinkled longitudi- 
nally, crossed by obsolete spiral folds; aperture little oblique, 
ovate, yelk-coloured inside; peristome thickened, slightly re- 
flected, with the margins angularly joined by a thick whitish 
deposit; columellar margin dilated into a rather thick, vaulted 
lamina, which, in full-grown shells, nearly covers the umbilicus. 
Height 35, greatest breadth 41, least br. 34 mill. 
Turbo foliaceus, Chemn. Conch. Cad. ix. P. ii. p. 59, t. 128, f. 1069, 
1070? Gmel. Syst. p. 3602, n. 104? 
Cyclostoma foliaceum, Pfr. Jc. n. 27, p. 36, t. 4, f. 10, 11? 
Cyclostoma naticoides, Récluz, in Rev. Zool. 1848, p. 3; Mag. Zool. 
1843, t. 73; Pfr. Ic. n. 28, p. 37, t. 6, f. 1-4. 
