CYCLOPHORIDZ. 179 
Cyclostoma canescens, Pfr. in Proc. Z. S. 1851; Ic. n. 284, t. 38, 
f. 36, 37. 
Tudora canescens, Pfr. Consp. n. 373, p. 75; Pneum. Mon. p. 255. 
Locality unknown. 
21. Tupora ? SIMULANS. 
Shell long, ovate-conic, very pale brown or dingy white, with 
numerous spiral series of small dark brown spots, which are 
often elongate, and which are arranged in inequidistant trans- 
verse stripes; with closely set rather strong transverse raised 
lines and indistinct spiral striz, moderately crenulate along the 
suture ; apex truncate; spire with the outlines moderately cur- 
vilinear; whorls remaining 4—5, quite convex, with a well-im- 
pressed suture; aperture ovate, orbicular, with two peritremes, 
of which the outer one is moderately expanded and reflected 
nearly into the plane of the aperture; the inner one is mode- 
rately produced and reflected; umbilicus very narrow, but ex- 
tending through the truncate summit. (At first sight this 
species appears like C. Adamsi, but is distinguished by being 
less elongated, by the spiral striz, and by the double peri- 
treme.) Mean divergence about 37°; length after truncation 
0.54; greatest breadth 0.34; least br. 0.23 inch. 
Cyclostoma simulans, Adams, Contr. to Conch. n. 8, p. 138. 
Tudora ? simulans, Pfr. Consp. n. 374; Pneum. Mon. p. 256. 
Hab. Jamaica, Easington. 
22. TupoRA ? OVATA. 
Shell oblong-ovate, truncate, thin, sculptured with close set slight 
longitudinal folds, silk-shining, brownish-horn-coloured or very 
pale horn-coloured, with regular series of reddish-brown spots; 
spire ovate-conic, truncate; suture slight, with irregular knotty 
crenulations; whorls remaining 5, moderately convex, the last 
one a little narrower, obsoletely and spirally grooved beneath; 
aperture perpendicular, roundish-ovate; peristome fuscous, 
double; inner edge shortly produced; outer edge dilated all 
round, expanded into the shape of a bell, radiatingly ribbed, 
angularly reflexed above, broadly affixed to the penultimate 
whorl and closing the perforation, with the left margin slightly 
auriculated, spreading. Operculum? Length 174, breadth 8 mill. 
Cyclostoma ovatum, Pfr. in Proc. Z. S. 1851; Ic. n. 306, t. 40, 
f, 21, 22, 
Tudora? ovata, Pfr. Consp. n. 375, p. 65; Pneum. Mon. p. 256. 
Hab. Cuba (Poey). 
