162 CATALOGUE OF PHANEROPNEUMONA. 
slightly thickened, angulated and doubled above. Length 10, 
breadth 4% mill. 
Truncatella solida, Menke, Synops. ed. ii. p. 137. 
Cyclostoma solidum, Pfr. Jc. n. 119, p. 116, t. 14, f. 4, 5. 
Cistula? solida, Gray, Cat. Cycl. p. 60, n. 15. 
Cyclostomus ? solidus, Pfr. Consp. n. 338; Pneum. Mon. p. 231. 
Locality unknown. 
oe 
68. CycLostomus ? GRATUS. 
Shell perforate, oblong-conic, solid, minutely crossed by raised 
spiral and very crowded longitudinal striew, somewhat shining, 
flesh-coloured; spire stair-like, conic, with the apex purplish, 
rather blunt; whorls 5, convex, the last one slightly flattened 
beneath, somewhat angular at its periphery and round the per- 
foration ; aperture oblique, nearly circular, angular above, fire- 
red within; peristome simple, continuous, straight, with the 
left margin shortly expanded above, slightly reflected at its 
lower part. Operculum? Length 7, breadth 5 mill. 
Cyclostoma gratum, Petit, in Journ. Conch. 1850, i. p. 53, t. 3, f. 10; 
Pfr. Te. n. 236, t. 34, f. 11, 12. 
Cyclostoma tricolor, Pfr. in Z. f. Mf. 1849, p. 128 (March, 1850). 
Cyclostomus ? gratus, Pfr. Consp. n. 339; Pneum. Mon. p. 231. 
Hab, The island of Abd-el-Goury, near Socotora. 
§ 9. Shell not keeled, ovate-turreted, smooth. Peristome expanded, 
double. 
69. Cycthostomus HuMPHREYANUS. B. M. 
Shell deeply rimate, ovate-conic, often truncate, thin, smooth, 
shining, whitish, painted with brown broken bands and streaks; 
suture deep, simple; whorls 4-6, convex, enlarging regularly; 
aperture nearly circular; peristome double; inner edge shortly 
produced, yellow; outer edge broadly expanded into the plane 
of the aperture, white or pale rose-coloured, narrower on the 
side of the penultimate whorl, with the upper and left margin 
dilated and protracted. Operculum testaceous, of five volutions, 
with the nucleus scarcely excentric. Length 19, breadth 10 
mill. 
Cistula picta, Humphr. MSS. 
Cyclostoma pictum, Sow. Thes. n. 142, p. 142, t. 28, f. 157, 158. 
(Not Pfr.) 
Cyclostoma Humphreysianum, P/r. in Z. f. If, 1846, p. 41. 
Cyclostoma Humphreyanum, P/r. Jc. n. 74, p. 80, t. 10, f. 9-11. 
