68 CATALOGUE OF PHANEROPNEUMONA. 
Cyclostoma rufescens, Sowerby, in Proc. Z. S. 1843, p. 60; Thes. 
n. 11, p. 94, t. 24, f. 36, 37; Pfr. Ic. n. 110, p. 109, t. 12, f. 16, 17. 
Cyclophorus rufescens, Pfr. in Z. f. MW. 1847, p. 108, n. 36; Consp. 
n. 138; Gray, Cat. Cyel. p. 23, n. 35; Pfr. Prneum. Mon. p. 96. 
Hab. Martinique. 
77. CYCLOPHORUS FORNICATUS. 
Shell nearly lenticular, rather thin, closely sculptured with raised 
concentric lines, covered with a horn-coloured greenish, scarcely 
shining periostraca; spire short, vaulted, with the apex reddish, 
rather blunt; whorls 4, scarcely convex, enlarging rapidly, last 
more convex, sharply keeled on its periphery; umbilicus deep, 
forming about one-third of the total breadth; aperture oblique, 
ovate-circular; peristome simple, straight, slightly interrupted, 
with the margins approximate; columeilar margin narrowly 
spreading. Operculum typical. Height 33, greatest breadth 9, 
least br. 7 mill. 
Cyclostoma fornicatum, Pfr. in Proc. Z. S. 1852; Jc. n. 405, t. 49, 
f. 6-8. 
Cyclophorus fornicatus, Pfr. Prewm. Mon. p. 97. 
Hab. New Hebrides Islands. 
$11. Shell depressed, obliquely wrinkled or foveolated ; peristome 
straight, thin. 
78. CYCcLOPHORUS PONDEROSUS. 
Shell conoidally depressed, thick, sculptured obliquely with subtle 
foveolate wrinkles, olivaceous-brownish; spire shortly conoidal, 
blunt; whorls 5, little convex, enlarging rapidly, the last one 
broad, somewhat depressed, with an obsolete cord-like keel at 
its periphery; umbilicus wide; aperture oblique, angularly 
ovate, white and shining inside; peristome thick, straight, 
rather continuous, dilated above into an angle; columellar mar- 
gin strongly arcuate. Operculum membranaceous, pale brown- 
ish. Height 20, greatest breadth 36, least br. 30 mill. 
Cyclostoma ponderosum, Pfr. in Proc. Z. 8S. 1851; Ic. n. 242, t. 35, 
f, 12-14. 
Cyclophorus ponderosus, Pfr. Consp. n. 139, p. 56; Pneum. Mon. 
p. 97. 
Hab. Guatemala. 
79. CYCLOPHORUS TEXTURATUS. 
Shell depressed, rather solid, foveolate by slight longitudinal 
waved, manifoldly divided and confluent folds, olivaceous- 
fulvid; spire very shortly conoidal, with the apex blunt ; whorls 
