CYCLOPHORIDA. 9 
Cyclostoma Inca, Orb. Syn. p. 29,n.2; Voy. Amér. p. 361, t. 16, 
f. 21-23 ; Sow. Thes. p. 92, n. 6, t. 24, f. 71, 72; Pfr. Ic. p. 12, 
n. 3, t. 1, f. 5-7. 
Cyclostoma blanchetiana, Moric. in Mém. Geneve, vii. p. 442, t. 2, 
f. 21-23; Pot. @ Mich. Gal. Douai, i. p. 233, t. 23, f. 21, 22 ; 
Desh. in Lam. Hist. viii. p. 366 3 n. 29. 
Cyclostoma Colombiensis, Fer. Mus. fide, Orb. 
Cyclostoma nobile, Fer. Mus. fide, Pot. & Mich. 
Aperostoma Inca, Pfr. in Z.f. MZ. 1847, p. 104. 
Cyclotus Inca, Gray, Cat. Cycl. p.6; Pfr. Consp.n. 5; Mon. p. 19. 
Hab. Bolivia, Brasilia, and La Guayra. — 
6. CycLoTUS STRAMINEUS. 
Shell depressed, nearly discoidal, thin, diaphanous, uniformly 
yellowish, with fine, crowded, oblique, fold-like striz, rising 
diagonally forward from the umbilicus, which is rather broad 
and open ; spire scarcely raised, with a fine, obtuse, prominent 
apex ; whorls 43, convex, finely wrinkled near the suture, last 
whorl a little depressed ; aperture nearly circular, scarcely 
angulate above ; peristome straight, rather thickened; its mar- 
gins angularly joined by a thin callus. Operculum typical. 
Height 12, greatest breadth 25, least br. 19 mill. 
Cyclostoma stramineum, [eeve, in Proc. Z. S. 1848, p. 46; Sow. 
Thes. p. 93, n. 8, t. 29, f. 211, 212 ; Pfr. Ic. p. 94, n. 90, t. 12, 
f. 6,7, t. 35, f. 7-9. 
Aperostoma stramineum, Pfr. in Z. f. M. 1847, p. 104. 
Cyclotus stramineus, Gray, Cat. Cycl. p. 7, n.6; Pfr. Consp. n. 6 ; 
Mon. p. 20. 
flab. W. Columbia, Merida (Reeve); La Guayra (Dr. Tams). 
Compare Cyclophorus ponderosus, texturatus et Dysoni, which 
are, when destitute of their opercula, very similar to C. stra- 
mineus. 
7. CYcLOTUS TRANSLUCIDUS. B. M. 
Shell turbinate-globular, rather thin, with crowded fold-like 
striz ; whitish, translucent, with a greenish horn-coloured 
epidermis; spire short, conoidal ; whorls 5, convex, the last one 
ventrose ; umbilicus narrow, open; aperture obliquely ovate, 
pearl-grayish ; peristome simple, straight, sharp; its margins 
angularly joined; columellar margin a little effused. Oper- 
culum with 7 whorls, of which the outer one is much 
broader. Height 15, greatest breadth 23, least br. 19 mill. 
Cyclostoma translucidum, Sow. in Proc. ZS. 1843, p. 29; Thes. 
p- 106, n. 46, t. 23, f.4; Pfr. Ic. p. 13, n. 4, t. 2, f. 8-10. 
Aperostoma translucidum, Pfr. in Z. f. MW. 1847, p. 104. 
