CYCLOPHORID A. 35 
Cyclostoma cornu venatorium, Sow. Thes. n. 48, p. 107, t. 24, f. 
41-42; Pfr. Fe. t. 49, f. 14-16? 
Aulopoma cornu venatorium, Pfr. in Z. f. I. Consp. nu. 63; Pneum. 
Mon. p. 53. 
Locality unknown. 
“This species approaches most nearly in shape to C. planor- 
bulum, Lam.; it may, however, be distinguished by its lip not 
being at all reflected.” A doubtful species, generally considered 
as identical with the preceding one, from which it seems to be 
different by its last whorl not being disjoined from the penult one. 
3. AULOPOMA HELICINUM. 
Shell subdiscoidal, rather thin, striate, pale horn-coloured, with 
reddish-brown stripes, and one band of the same; spire mu- 
cronated, blueish-brown; whorls 4, cylindrical, the last one 
descending anteriorly and disjoined ; aperture oblique, rather 
circular ; peristome straight, thin, sharp. Operculum with the 
whorls more narrow, than of A. Itierli, convex, and crowdedly 
folded externally. Height 63, greatest breadth 13, least br. 
10 mill. 
Turbo helicinus, Chemn. Conch. Cab. ix. P. ii. p. 59, t. 123. f. 
1067, 1068. 
Turbo helicoides, Gmel. Syst. p. 3602, n. 103. 
Cyclostoma helicinum, Pfr. lc. n. 26, p. 35, 160, t. 4, f. 5, 6, t. 22, 
f. 4, 5. 
Cyclostoma papua? Pfr. Nuit. Regist. p. 85. 
Aulopoma helicinum, Pfr. in Z. f. M. 1847, p. 111; Consp. n. 64; 
Gray, Cat. Cycl. n. 14, p.2; Pfr. Pneum. Mon. p. 53. 
Hab. Ceylon (Dr. Th. Philippi). 
V. CYCLOPHORUS. 
Operculum horny, thin, closely whorled, more or less concave 
externally. Shell globose-turbinate, depressed or discoidal ; 
peristome continuous, expanded or straight. 
Cyclophorus, Montfort, Conch. Syst. ii. p. 290, 1810; Blainv. in Dict. 
Sc. Nat. xii. p. 290; Malac. p. 435; Desh. in Eneycl. Meth. ii. 
p. 236; Pfr. im Z. f. M. 1847, p. 47, 107; 1851, p. 1388; Consp. 
p. 10; Gray, in Proc. Z. S. 1847, p. 182; Cat. Cycl. p. 15; 
Pfr. Preum. Mon. p. 54. 
Annularia a, Schumacher, Essai, p. 196, 1817. 
Cyclophora, Swains. Malac. p. 185, 336, 1840 (part). 
Annularia, Gray, Syn. Brit. Mus. 1840 & 1842, p. 91. 
Aperostoma, T'rosch. in Z. f. M. 1847, p. 44 (part). 
Cyclostoma sp., Auct. 
