50 CATALOGUE OF PHANEROPNEUMONA. 
vous ; spire turbinate, with the apex grayish, rather pointed ; 
whorls 5, moderately convex, the last one obtusely angulated and 
marked with a white band at its periphery, paler beneath, with 
obsolete bands ; umbilicus narrow, open; aperture large, some- 
what oblique, circular with a slight angle; peristome simple, 
thin, with the margins distant, right margin shortly expanded ; 
columellar margin rather dilated, vaulted and expanded. Operc.? 
Height 19, greatest breadth 27, least br. 23 mill. 
Cyclostoma luridum, Pfr. in Proc. Z. S. 1851; Ic. n. 364, t. 45, 
Z, 15, 26. 
Cyclophorus ? luridus, Pfr. Consp. n. 99, p. 53; Pnewm. Mon. 
p. 73. 
Locality unknown. 
This species may be perhaps referred to the genus Leptopoma. 
33. CYCLOPHORUS LEUCOSTOMUS. 
Shell depressed-turbinate, solid, obliquely and very closely striate, 
furnished with very numerous blunt spiral ridges, several of 
which are stronger; colour chestnut-fulvous, irregularly striped 
with angular white flames; spire turbinate, with the apex 
rather blunt ; whorls 43, convex, the last one white round the 
umbilicus, which is narrow, but open; aperture somewhat 
oblique, nearly circular, white inside ; peristome simple, rather 
thickened, white, shortly affixed, with the margins united above 
in a little distinct angle; columellar margin dilated, expanded. 
Height 16, greatest breadth 26, least br. 21 mill. 
Cyclostoma leucostomum (Cyclophorus), Pfr. in Proc. Zool. Soc. 
1852; Ic. n. 398, t. 48, f. 14-16. 
Cyclophorus leucostomus, Pfr. Preum. Mon. p. 73. 
Locality unknown. 
34. CycLOPHORUS ZEBRA. B. M. 
Shell perforate, globose-conic, thick, sculptured with spiral lines 
and several thread-like raised keels, marbled with brown and 
whitish ; spire turbinate, blackish towards the summit, with 
the apex rather pointed; whorls 5, convex, the penult one 
somewhat bunchy, the last one girdled with one white band ; 
aperture oblique, ovate-circular, whitish inside; peristome nearly 
straight, doubled, thickened externally, with the margins united 
by a sinuate deposit; columellar margin reflected, often half 
covering the very narrow umbilicus. Operc. pale. Height 15, 
greatest breadth 17, least br. 15 mill. 
Cyclostoma zebra, Grateloup, in Act. Bord. xi. p. 441, t. 3, £.9; 
Pfr. Ic. nu. 138, p. 132, t. 13, f. 31, 32. 
