CYCLOPHORIDA. 139 
usually truncate ; whorls 4-6, convex, girdled with two or three 
strong keels, Jast whorl convex beneath, furnished with a sharp 
keel surrounding the umbilicus, which is funnel-shaped and 
strongly furrowed spirally ; aperture roundish, angular above; 
peristome expanded, slightly thickened, with the margins joined, 
angulated by the keels. Height 21, greatest breadth 28, least 
br. 23 mill. 
Buconium umbilicatum, Lister, Hist. t. 28, f. 26; Schroet. Hin. ii. 
prash ns 10; } 
Turbo carinatus, Born, Test. p. 353, t. 13, f. 3,4; Schroet. Hinl. 
ii. p. 103, n. 118; Gmel. Syst. p. 3601, n. 57; Dillw. Cat. ii. 
p. 866, n. 123. 
Cyclostoma carinata, Zam. Hist. vi. p. 143, n. 3; Hd. Désh. viii. 
p- 3542; Désh. in Encycl. Méth. ii. p. 40, n. 3? 
Cyclostoma tricarinatum, Sow. Thes. n. 86, p. 120, t. 26, f. 122; 
Pfr. Ic. 0. 17, p. 25, t. 3, f. 8 (not t. 4, f. 16, 17). 
Tropidophora carinata, Pfr. in Z. f. I. 1847, p. 106, n.5; Gray, 
Cat. Cycl. p. 38, n. 3. 
Cyclostomus carinatus, Pfr. Consp. n. 288 ; Pnewm. Mon. p. 198. 
Locality unknown. 
15. CycLosToMUS UNICOLOR. 
Shell globose-conical, solid, faintly striate longitudinally, crowd- 
edly furrowed spirally, opaque, whitish; spire conical, with the 
apex fulvous, rather blunt ; whorls 5, moderately convex, the 
last one sharply keeled above and on the middle, with a third 
very strong keel surrounding the umbilicus, which is narrow, 
funnel-shaped, deeply spirally grooved within ; aperture rather 
oblique, angularly rounded ; peristome simple, with the margins 
joined by a lunar-shaped emarginated callus; right margin 
slightly expanded, left margin angularly thickened in the 
middle. Height 20, greatest breadth 28, least br. 22 mill. 
Cyclostoma unicolor, Pfr.in Proc. Z. S. 1851; Jc. n. 289, t. 39, 
275.0; 
Cyclostomus unicolor, Pfr. Consp. n. 289, p. 62; Pneum. Mon. 
p- 199. 
8. Smaller ; fulvous-straw-yellow, closely striate longitudinally. 
Height 16, greatest breadth 20, least br. 17 mill. (Pfr. Lc. t. 39, 
Ee Te) 
Locality unknown. 
16. CycLOSTOMUS DELICIOSUS. 
Shell globose-turbinate, rather thin, striate, furnished on the 
middle with three sharp and several smaller keels, cinnamon- 
coloured ; spire turbinate, with the apex rather pointed; whorls 
