270 CATALOGUE OF PHANEROPNEUMONA. 
sometimes with purplish bands; spire conic, rather pointed ; 
whorls 55, moderately convex, last inflated, convex beneath ; aper- 
ture somewhat oblique, semiovate, rather triangular; columella 
short, with a small tooth at its base, which is directed back- 
wards, dilated above into a rather thick, circumscript callus; 
peristome thin, spreading angularly, dilated on the middle, 
with the basal margin scarcely arcuate. Operc. thin, chestnut- 
purplish. Height 7, greatest breadth 92, least br. scarcely 
8 mill. 
Helicina vernalis, Morelet, Testac. Noviss. i. p. 20, n. 47; Pfr. Ic. 
n. 96, t. 10, f. 12-14; Pneum. Mon. p. 372. 
Hab. Peten, Guatemala. 
78. HericinA OWENIANA. 
Shell conic, thin, smooth, sculptured (under a lens) with very 
minute impressed strie, which are oblique forward, shining, 
pellucid, straw-yellow, darker towards the summit; spire conic, 
with the apex rather blunt, chestnut-coloured; suture linear, 
bordered with white; whorls 6, flat, last not descending, rather 
flattened beneath; aperture slightly oblique, semiovate; colu- 
mella short, grooved perpendicularly, dilated backwards into a 
very thin callus; peristome orange-coloured, spreading angu- 
larly, somewhat reflexed, with the two margins very faintly 
arcuate. Operculum thin, purplish. Height 73, greatest 
breadth 9, least br. 75 mill. 
Helicina Oweniana, Pfr. in Proc. Z. S. 1848, p. 123; Jc. n. 48, 
p. 40, t. 7, f. 35, 36; Pnewm. Mon. p. 373. 
8. A little smaller, with the whorls more convex and the spire 
less raised. 
Helicina coccinostoma, Morelet, Testac. Noviss. i. p. 19, n. 45. 
Hab. Chiapas, Mexico (Ghiesbreght); the variety from Peten, 
Guatemala. 
79. HEeLICINA HEMASTOMA. 
Shell conic-globose, rather solid, very minutely striated con- 
centrically, slightly shining, yellowish-white, with a single 
broad violaceous band; spire semiglobose, with the apex acu- 
minated, violaceous; whorls 5, the upper ones rather flat, the 
two last convex, last not descending; aperture nearly tri- 
angular, of the same colour within, shining; columella short, 
straight, terminating backwards in a knot; peristome some- 
what thickened, expanded, fiery-red; basal callus circular, 
brownish-orange-coloured. Operculum dark blood-red. Height 
7, greatest breadth 9, least br. 8 mill. 
Helicina hemastoma, Moricand, Mémoire, iii. p. 36, t. 3, f. 6, 7; 
