136 CATALOGUE OF PHANEROPNEUMONA, 
by thin callus, right margin sinuate above, vaulted and ex- 
panded, angulated by the ends of the keels, columellar margin 
aes scarcely reflected. Height 9, greatest breadth 24, least 
r. 19 mill. 
Cyclostoma modestum, Petit. in Journ. Conch. 1850, i. p. 50, t. 4, 
£2; Pfr. Ic. n. 333, t. 42, f. 16-18. 
Cyclostomus modestus, Pfr. Consp. n. 281; Pneum. Mon. p. 193. 
Hab. The Island of Abd-el-Goury. 
8. CycLOSTOMUS LIRATUS. 
Shell nearly discoidal, rather solid, radiatingly striate, furnished 
above and beneath with crowded sharp spiral ridges, not shining, 
grayish-flesh-coloured; spire scarcely raised, with the apex 
nipple-shaped; suture deep; whorls 4, scarcely convex, the last 
one depressed along the suture, bearing on the periphery 5-6 
more distant stronger keels, descending anteriorly ; umbilicus 
broad and open; aperture very oblique, oblong-circular; peri- 
stome double; inner edge continuous, faintly prominent; outer 
edge dilated, expanded and inflexed, with the columellar mar- 
gin extremely narrow. Height 7-8, greatest breadth 18, least 
br. 143 mill. 
Cyclostoma liratum, Pfr. in Proc. Z. S. 1851; Je. n. 340, t. 42, 
ro, LO: 
Cyclostomus liratus, Pfr. Consp. n. 282, p.61; Pneum. Mon. p. 194. 
Locality unknown. 
§ 2. Shell rather more keeled; turbinate-conical. 
9. CYCLOSTOMUS CAMPANULATUS. 
Shell turbinate, solid, very crowdedly and slightly striate, yellow- 
ish, marbled irregularly with gray and dark flesh-colour; spire 
conical, raised, with the apex rather blunt; whorls 6, the upper 
ones convex, the following angulated, enlarging rapidly, the last 
one girdled with two sharply-raised and with several more obsolete 
keels, crowdedly and deeply grooved beneath; umbilicus narrow, 
_ rather funnel-shaped, scarcely pervious; aperture ovate-round- 
ish, rather angulated above, blackish-chestnut-coloured and ex- 
tremely polished within; peristome continuous, dilated, bell- 
shaped, flesh-coloured, lunarly emarginate on the penultimate 
whorl, with the columellar margin sinuate. Height 34, great- 
est breadth 45, least br. 35 mill. 
Cyclostoma campanulatum, Pfr. in Z. f. MW. 1847, p. 57; Je. n. 141, 
““p. 135, t. 18, f. 4-6, 
Cyclostoma unicarinatum, Sow. Thes. t. 26, f. 119 (not f. 120). 
Cyclostoma tricarinatum, Pot. et Mich. Gal. Douwai, i. p. 242, t. 24, 
. f. 22, 232 
