CYCLOPHORID A. 29 
oblique, nearly circular, blueish-white inside; peristome double ; 
internal edge a little expanded and incumbent, with a tri- 
angular notch above; external edge expanded, dilated above in 
a flattened cap near the penult whorl. Operc. with the apex 
flattened, spiral lamella narrow with 3-4 whorls. Height 8, 
greatest breadth 28, least br. 223 mill. 
Spiraculum hispidum, Pearson, in Journ. As. Soc. ii. p. 391, t. 20. 
Pterocyclos hispidus, Bens. in Journ. As. Soc. v. p. 355; Ann. & 
Mag. 2nd ser. i. p. 346; Pfr. in Z. f. 1851, p.6; Consp. n. 52; 
Gray, Cat. Cycl. p. 12, n.2; Pfr. Pneum. Mon. p. 46. 
Pterocyclos Prinsepi, Pfr. in Z. f. Mf. 1847, p. 111; Jc. p. 195, t. 
24, f.7-10; Gray, Cat. Cyel. p. 12, n. 1. 
Steganotoma Princepsi, v.d. Busch. in Phil. Abid. i. 5, p. 106 ; 
Cyel. t. 1, f. 6. 
Cyclostoma spiraculum, Sow. Thes. n. 59, p. 110, t. 31, f. 270-272 ; 
Petit, in Journ. Conch. i. p. 43. 
Hab. India, the Himalayan region ; Khasya Hills (Benson). 
9. PTEROCYCLOS RUPESTRIS. B. M. 
Shell depressed, nearly discoidal, rather solid, horn-coloured- 
whitish, slightly striate, with angular chestnut-coloured stripes 
above, and a band of the same colour at the periphery; spire 
nearly flat, prominent in the middle; whorls not quite 6, con- 
vex, wrinkled near the suture, which is deeply impressed, the 
last whorl cylindrical, not descending anteriorly ; umbilicus 
broad; aperture oblique, nearly circular; peristome double ; 
inner edge straight, deeply indented above; outer edge rather 
expanded, dilated and convex over the incisure. Operculum 
typical, with a little raised spiral lamina. Height 8, greatest 
breadth 22, least br. 19 mill. 
Pterocyclos rupestris, Benson, in Jowrn. As. Soc. i. p. 11, t. 2; 
Ann. & Mag. 2nd ser. i. p. 346; Pfr. in Z. f. M. 1851, p. 4; Le. 
t. 31, f£. 3-5; Consp. n. 53; Pneum. Mon. p.46; Gray, Cat. Cyel. 
12, n. 3. 
Bielcs pictus, Trosch. in Z. f. M. 1847, p.45; Pfr. ibid. p. 111; 
Fe. p. 194, t. 24, f. 21-25 ; Gray, Cat. Cyel. p. 12, n. 5. 
Steganotoma picta, Zrosch. in Wregm. Arch. f. Nat. 1887, i p. 165, 
io ede 1 
Steganotoma pictum, Philippi, Abid. i. 5, p. 105; Cyclost. t. 1, 
£. 5 
Cyclostoma .. . Sow. Conch. Man. f. 531 ? 
Cyclostoma pictum, Petit, in Journ. Conch. i. 43, 
B. Smaller; height 61, greatest breadth 14 mill. (Pfr. Jc. t. 31, f. 
9-11. 
Hab. India, Patharghata, province of Bahar. 
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