168 CATALOGUE OF PHANEROPNEUMONA. 
§S 11. Shell not keeled, ovate-turreted, decussated; peristome ex- 
panded, double. 
81. Cyctostomus RANGELINUS. 
Shell perforate, conically turreted, shortly truncated, rather thin, 
sculptured with raised spiral and more crowded longitudinal 
lines, which are more obsolete on the last whorl, diaphanous, 
yellowish-horn-coloured, painted with very numerous chestuut- 
coloured spiral lines, which are sometimes joined into bands, or 
altogether yellowish or wine-coloured; suture furnished with 
strong, white, fasciculate teeth; whorls remaining 5,. convex, 
last rounded; aperture rather perpendicular, ovate-roundish ; 
peristome double; inner edge continuous, shortly produced and 
expanded; outer edge narrowly reflected, slightly auriculate 
above, indented below the penultimate whorl. Operculum like 
that of C. costulatus, Zl. Length 223, breadth 12 mill. 
Cyclostoma Rangelinum, Poey, Memorias Sobra la Hist. Nat. de la 
Isla de Cuba, i. t. 8, f. 138-19; ii. p. 98-106; Pfr. Ic. 388, t. 47, 
f. 17-19. 
Cyclostomus Rangelinus, Pfr. Consp. un. 350a.; Pnewm. Mon. 
p. 240. 
Hab. Sierra de Rangel, Cuba (Poey). 
82. CYcLOSTOMUS RETRORSUS. 
Shell subperforate, ovate-oblong, thin, truncate, closely and 
coarsely trellised by spiral ridges and crowded longitudinal 
ribs, not shining, pale horn-coloured, with irregular dots and 
streaks of reddish-brown; suture slightly channelled, toothed ; 
whorls remaining 4, ventricose, the last one not detached, 
rounded, furnished round the perforation with four or five 
stronger ridges; aperture perpendicular, circular; peristome 
multiplied, concentrically striated, broadly vaulted and reflected, 
so as to form a canal behind it, indented on the penultimate 
whorl, angulated above. Operculum (passing to Choanopoma) 
testaceous, flat, its whorls forming a channel. Length 16-17, 
breadth 9 mill. 
Cyclostoma retrorsum, Adams, Contrib. to Conch. n. 6, p. 91; Pfr. 
Ic. n. 258, t. 36, f. 15-16. 
Oyclostomus retrorsus, Pfr. Consp. n. 351; Pnewm. Mon. p. 240. 
Hab. Jamaica. 
83. CYCLOSTOMUS SALEBROSUS. 
Shell rimate, subperforate, ovate-turreted, truncated, rather solid, 
rather coarsely trellised by close-set longitudinal ribs, and 
slight spiral ridges, not shining, whitish-gray; suture irregu- 
