16 CATALOGUE OF PHANEROPNEUMONA. 
carinate around the broad umbilicus; aperture oblique, circular ; 
peristome continued, straight, rather thickened. Opere.? 
Height 74, greatest breadth 16, least br. 124 mill. 
Cyclostoma subrugosum, Sow. Thes. Suppl. n. 186, p. 161%, t. 31, 
B. £.308, 309 ; Pfr. Ic. n. 334, t. 42, £. 19, 20. 
Cyclotus subrugosus, Pfr. Consp. n. 21; Mon. p. 28. 
Hab. Jamaica. 
22. Cyvctotus DuFFIANUS. 
Shell large, discoidal, reddish and white ; whorls 42, cylindrical ; 
umbilicus broad, deep ; margin simple. Operc.? Height 0.87, 
greatest breadth 1.9, least br. 1.45 inch. (A.) 
Cyclostoma Duffanum, Adams, in Proc. Bost. Soc. 1845, p. 11. 
Aperostoma Dufhanum, Pfr. in Z. f. M. 1847, p. 104. 
Cyclotus ? Duffianus, Gray, Cat. Cycl. p. 7, 0. 5 ; Pfr. Consp.n. 22 ; 
Mon. p. 29. 
Hab. Jamaica. 
23. CYCLOTUS CRASSUS. 
Shell conoidal-depressed, solid, with crowded strie, greenish-brown, 
or dark-brownish ; spire shortly conoidal, with the apex yel- 
lowish, rather pointed ; suture moderate ; whorls 5, convex; the 
last one obsoletely spirally striate, slightly wrinkled above, 
rather convex beneath, not, or scarcely, compressed around the 
umbilicus, which is not very large; aperture oblique, oval, 
angular, livid, and shining inside ; peristome continued, shortly 
afixed, with the margins joined into a subacute angle; right 
margin straight, simple; columellar margin thickened, somewhat 
reflected. Operé. of 7 whorls, with the spiral lamina raised and 
moderately reflected. Height 10, greatest breadth 18, least br. 
15 mill. 
Cyclostoma crassum, Adams, Contrib. to Conch. n. 8, p. 148, 147 ; 
Pfr. Ic. n. 359, t. 44, f. 14-16. 
Cyclotus crassus, Pfr. Consp. n. 23 ; Mon. p. 29. 
Hab, Jamaica, Manchester. 
24, CycLoTUS PERPALLIDUS. 
Shell white, reddish on the upper whorls, with a pale greenish- 
brown epidermis; transverse strie, very fine, wrinkled, with 
minute wrinkles nearly covering the last whorl; umbilical keel 
wanting ; spire moderately elevated ; whorls 5; last whorl flat- 
tened beneath, making the periphery subangular; with the 
suture well impressed ; aperture suborbicular, effuse, pointed, 
and much advanced above; lip thick; umbilicus half as wide 
as the aperture. Operc.? Height 0.45, greatest breadth 0.7, 
least br. 0.58 inch. (A.) 
