HELICINID A. ha 
oblique, triangular, reddish within; columella simple, dilated 
backward into a rather thick, whitish callus; peristome simple, 
blunt, with the right margin rounded. Height 33, greatest 
breadth 6, least br. 5 mill. 
Helicina constricta, Pfr. in Proc. Z. S. 1848, p. 120; Jc. n. 19, 
p- 22, t. 7, f. 37-39; Pneum. Mon. p. 350. 
8. With the basal callus fiery-red. 
Helicina rhodostoma, Mighels. MSS. (Not Sowerby.) 
Hab. Sandwich Islands. 
25. HELIcINA LENTICULARIS. 
Shell globose-lenticular, keeled, smooth, orange-coloured above ; 
suture white ; aperture angulated exteriorly ; lower part pale, 
moderately convex; peristome thickened; columella callous, 
orange-coloured at its base. General form approaching very 
near to H. viridis, Gray. (Sow.) 
Helicina lenticularis, Sowerby, in Tank. Catal. App. p. viii. n. 1024 ; 
Pfr. Preum. Mon. p. 350. 
Hab. The Islands of Pacific Ocean. 
§ 4. Peristome toothless, straight, sharp; shell globose or subconic. 
26. HeLICINA CINGULATA. 
Shell conoidally-globose, rather solid, sculptured with rather 
crowded spiral striz, opaque, flesh-coloured-whitish, with two 
yellow bands ; spire yellow, convexly conoidal ; with the apex 
somewhat acute ; whorls 53, moderately convex, last rounded ; 
columella short, perpendicular, with a slight knot at its base, 
dilated backward into a thin circumscript callus; aperture 
scarcely oblique, semiovate ; peristome simple, straight, with 
the basal margin slightly arcuate, forming an angle with the 
columella. Height 5, greatest breadth 73, least br. 63 mill. 
Helicina cingulata, Pfr. in Proc. ZS. 1852; Pnewm. Mon. p. 351. 
Hab. Haiti (Sallé). 
27. HELICINA COSTATA. B. M. 
Shell conic, rather solid, sculptured with spiral rib-like strizx, 
whitish or yellow; spire conic, acuminated ; whorls 6, scarcely 
convex, the last one shorter than the spire, not descending an- 
teriorly, rather flattened beneath; aperture oblique, entire, 
ovate, rather triangular, yellow within; columella short, re- 
ceding, dilated backward into a thin shining callus ; peristome 
Z 
