14 CATALOGUE OF PHANEROPNEUMONA. 
Cyclostoma corrugatum, Sow. in Proce. Z. S. 1848, p. 30; Thes. 
p. 95, n. 14, t. 23, f.10,11; Pfr. Ic. p. 17, n.8, t..2, Bae 
t. 44, f.5, 6; Adams, Contrib. to Conch. N. 8, p. 143. 
Aperostoma corrugatum, Pfr. in Z. f. If, 1847, p. 104. 
Cyclotus (Poteria) Jamaicensis, Gray, Cat. Cycl. p. 11, n. 28. 
Cyclotus corrugatus, Pfr. Consp. n. 16; Mon. p. 26. 
Hab. Jamaica. 
17. CycLoTUSs JUGOSUS. 
Shell depressed, solid, white, with a fulvous-brownish periostraca 
and crowded striz ; spire raised very shortly, terminated into 
a fine reddish apex ; suture slight, whorls 5, depressed-convex, 
rapidly increasing, the last one dilated anteriorly, irregularly 
and coarsely wrinkled and nodulous above, obliquely rugose 
and suleate beneath, with an obsolete keel around the large 
funnel-shaped umbilicus ; aperture very oblique, transversely 
ovate, inside white; peristome continued, shortly affixed; its 
margins joined above into an angle, which is sometimes super- 
structed; right margin sinuate, blunt; columellar margin 
slightly arcuate, thickened. Operculum concave, of 8 narrow 
whorls, the margins of which are raised into a high and in- 
curved lamella. , Height 12, greatest breadth 24, least br. 
18 mill. 
Cyclostoma jugosum, Adams, Contrib. to Conchol. nu. 8, p. 143; 
Pfr. Fe. n. 358, t. 44, f. 10-13. 
Cyclotus jugosus, Pfr. Consp. n. 17 ; Mon. p. 27. 
Hab. Jamaica. 
18. CycLoTUS PALLESCENS. 
Shell with the spire brownish-red, and the last whorl white ; with 
a brown epidermis ; with the transverse striz fine and regular 
on the spire, and very irregular on the last whorl ; with fine 
wrinkles commencing above near the end of the penult whorl; 
last whorl very coarsely and irregularly wrinkled above, nearly 
or quite smooth beneath ; the umbilical keel is obsolete ; spire 
depressed ; whorls nearly 5; last whorl flattened above, with 
the suture moderately impressed ; aperture orbicular, slightly 
effuse and pointed above ; lip scarcely sinuate above, moderately 
advanced on the right side; umbilicus about two-thirds as 
wide as the aperture. Operculum with a much elevated spiral 
lamella, the whorls of which, 6 or 7 in number, are saucer- 
shaped, that is, reflected, with the inner surface concave. 
Height 0.67, greatest breadth 1.15, least breadth 0.91 inch. (Ad.) 
Cyclostoma pallescens, Adams, Contrib. to Conch. n. 8, p. 143, 144. 
Cyclotus pallescens, Pfr. Consp. n. 18 ; Mon. p. 27. 
Hab. Jamaica. 
