252 CATALOGUE OF PHANEROPNEUMONA. 
a operculum horny. Height 8, breadth 14-15 mill. 
ow. 
Helicina Candeana, Orbigny, in Sow. Thes. u. 55, p. 11, t. 3, £. 97, 
99; Pfr. Pneum. Mon. p. 399. 
Hab. Honduras. 
142. HEeLIcINA CONCENTRICA. B. M. 
Shell depressed-trochiform, rather thin, very minutely sculptured, 
under a lens, with longitudinal and oblique striz, and marked 
on both sides with raised spiral lines, sharply keeled, slightly 
shining, flesh-coloured-fuscous, varied with white; spire con- 
oidal, somewhat nipple-shaped ; whorls 43, scarcely convex, the 
last more convex above and beneath ; aperture oblique, rather 
axe-shaped, broader than high; columella slightly grooved, 
shortly arcuate, thickened at its lower extremity, and dilated 
backwards into a white circumscript callus ; peristome simple, 
narrowly expanded, with the basal margin immediately con- 
tinued into the columella. Operculum thin, chestnut-coloured. 
Height scarcely 6, greatest breadth 10, least br. 8 mill. 
Helicina concentrica, Pfr. in Proc. Z. S. 1848, p. 120; Pfr. Ie. 
n. 83, p. 61, t. 7, f. 28, 29; Pneuwm. Mon. p. 400. 
8. With the spire a little more raised; height 6, greatest breadth 
9, least br. 73 mill. 
y. Larger; with the raised spiral lines indistinct below the keel; 
height 73, greatest breadth 123, least br. 10} mill. (Pfr. Je. 
t. 8, f. 18, 19.) 
5. Larger; with the keel more compressed, peristome somewhat 
thickened and produced into a beak; height 9, greatest breadth 
nearly 15, least br. 123 mill. 
Hab. Venezuela; variety 8 from New Granada (Lattre); y from 
Mirador, Mexico (Galeotti); 6 from Caraccas (Sallé). 
143. HELICINA CARINATA. B. M. 
Shell orbiculate-conoidal, rather thin, sculptured with crowded 
spiral strie and ridges, diaphanous, slightly shining, lemon- 
yellow ; spire conoidal, pointed ; whorls 44, moderately convex, 
last keeled on the periphery, not descending anteriorly, a little 
more convex beneath; aperture oblique, rather triangular, 
higher than broad; columella extremely short, perpendicular, 
terminating in a slight knot, dilated backwards into a thin, 
circumscript callus; peristome white, shortly expanded. Height 
43, greatest breadth 72, least br. 6} mill. 
