HELICINID A. 283 
115. Hexicina CoLUMBIANA. B. M. 
Shell conic, rather solid, very closely striated spirally, slightly 
shining, flesh-coloured above, sometimes with a single broad 
fuscous band, yellowish beneath ; spire regularly conic ; whorls 
5, moderately convex, last keeled, not descending ; aperture 
semicircular, somewhat angular ; columella short, thinner at its 
lower extremity, separated from the white, shining basal callus 
by a faintly-impressed perpendicular line; peristome thickened, 
white, narrowly expanded, with arcuate margins. Operculum 
semicircular, shining, chestnut-coloured. Height 8, greatest 
breadth 11, least br. 95 mill. 
Helicina Columbiana, Philippi, in Z. f. If. 1847, p. 126; Pfr. Ic. 
n. 68, p. 52, t. 2, f. 1-3, t. 9, f. 5, 6; Pnewm. Mon. p. 388. 
8. Larger; yellowish, with darker points, whitish beneath (Pfr. 
Berth: (15) 7): 
Hab. Columbia. 
116. HenicInA GONOCHILA. B. M. 
Shell conoidally subglobose, rather thin, sculptured above with 
indistinct spiral striz and points, slightly shining, fulvous-flesh- 
coloured ; spire short, conoidal, rather pointed; whorls 43, 
scarcely convex, last slightly keeled on the periphery, marked 
with a yellow band, more convex, and with more distinct spiral 
strie beneath; aperture slightly oblique, semiovate, rather tri- 
angular, higher than broad; columella somewhat receding, 
sending off, at its upper part, a short impressed curved line, 
sharply toothed at its lower extremity ; peristome white, spread- 
ing broadly and rectangularly; basal margin nearly rectilinear, 
forming a rather acute angle with the columella. Height 62, 
greatest breadth 10, least br. 8 mill. 
Helicina gonochila, Pfr. in Proc. Z. S. 1845, p. 121; Jc. n. 69, 
p. 53, t. 7, f. 20,21; Pneum. Mon. p. 389. 
Hab. Venezuela. 
117. HELICINA ELONGATA. 
Shell conic, solid, sculptured with rather distant raised spiral 
strie, slightly shining, white; spire conic, with the apex yellow, 
acuminated ; whorls 7, the upper four angulated, stair-shaped, 
the two following rather flat, the last one moderately convex, 
slightly keeled ; columella short, nearly perpendicular, dilated 
backwards into a rather thick, circumscript callus; aperture 
very oblique, roundish-triangular, yellow within ; peristome 
thin, expanded, with the upper margin somewhat sinuate, basal 
margin towards the columella straight, sharp. Operculum 
