210 CATALOGUE OF PHANEROPNEUMONA. 
concentrically, marked with radiating plaits and chestnut-co- 
loured rays, wanting on the columella, and altogether covering 
the umbilicus with a white vaulted lamina. Operculum typical. 
Length 22, breadth 11} mill. 
Oyclostoma Shuttleworthi, Pfr. in Proc. Z. S. 1851; Jc. n. 254, 
t. 36, f. 7, 8. 
Chondropoma Shuttleworthi, Pfr. Consp. n. 437, p. 70; Pnewm. 
Mon. p. 295. 
Hab. Cuba. 
33. CHONDROPOMA TENEBROSUM. 
shell perforated by a half-closed umbilicus, ovate-conic, rather 
thin, decussated with raised longitudinal and more distant 
spiral strie, scarcely shining, violaceous-blackish ; spire conic, 
shortly truncate ; suture impressed, simple; whorls remaining 
A, convex, enlarging rapidly; aperture nearly perpendicular; 
large, ovate; peristome double ; inner edge shortly prominent ; 
outer edge dilated, spreading rectangularly all round, striated 
concentrically, angulated above, vaulted and half affixed on the 
penultimate whorl, forming a small sinus with the basal 
margin. Operculum typical. Length 16, breadth 9 mill. 
Cyclostoma tenebrosum, Morelet, Testac. Noviss. i. p. 23, n. 60; 
Wren. 265, t. 37, 111,12. 
Cyclostoma claudicans, Poey, Memorias Hist. Nat. Cuba, i. t. 7, 
f, 8-11; ii. p. 101, 106. 
Chondropoma tenebrosum, Pfr. Consp. n. 438; Pneum. Mon. p. 295. 
8. Shell fulvous, with the outer edge of the peristome slightly 
angulated above. 
Hab. Cuba, Mountains of Guajaibon. 
34. CHonpROPOMA OTTONIS. 
Shell ovate-oblong, truncate, thin, minutely decussated, rather 
coarse, slightly diaphanous, fuscous-horn-coloured; suture mid- 
dle, simple ; whorls remaining 4, moderately convex, increasing 
regularly; aperture perpendicular, obliquely ovate, somewhat 
angulated above ; peristome double ; inner edge simple, white, 
shining, not prominent ; outer edge expanded broadly, slightly 
auriculated above, with the right and basal margin spreading 
broadly, striated concentrically, abruptly cut off near the colu- 
mella ; left margin forming a vaulted lamina, which is affixed 
altogether and closes perfectly the umbilicus. Operculum 
typical. Length 12-18, breadth 7-10 mill. 
Cyclostoma Ottonis, Pfr. in Z. f. M. 1846, p. 45; Ic. n. 36, p. 45, 
(6, £. 7, 8: 
Choanopoma? Ottonis, Pfr. in Z. f. M. 1847, p. 107, n. 6; Gray, 
Cat. Cycl. p. 50, n. 6, 
