O52 CATALOGUE .OF PHANEROPNEUMONA, 
21. HELICINA CRASSILABRIS. 
Shell depressed, rather lenticular, solid, opaque, smooth, whitish, 
indistinctly varied with horn-colour; spire scarcely raised, with 
the apex slightly mucronate; suture linear; whorls 4, flat, 
increasing rapidly, the last one keeled, scarcely descending 
anteriorly, little convex beneath; aperture very oblique, tri- 
angular; columella very short, forming a rounded angle with 
the peristome, which is straight, blunt, and somewhat thickened 
internally ; basal callus rather thick, circumscript, shining. 
Height 4, greatest breadth 7, least br. 6} mill. 
Helicina crassilabris, Philippi, in Z. f. M. 1847, p. 125; Pfr. Ic. 
n. 16, p. 20, t. 2, f. 33-36; Pneum. Mon. p. 349. 
Hab. The Sandwich Islands? (Philippi); Venezuela? (Linden, in 
Mus. Cuming). 
22. HELICINA SOLIDULA. B. M. 
Shell semiglobose, thick, solid, smooth, shining, yellowish or flesh- 
coloured ; spire convex, obtuse ; suture linear; whorls 5, rather 
flat, the last scarcely descending anteriorly, rather convex, 
keeled on the periphery; keel subacute, bordered beneath with 
an impressed line; aperture very oblique, lunate, somewhat 
triangular, gold-yellow within; columella simple, forming a 
sharp angle with the peristome, which is straight, blunt, with 
the margins joined by a semicircular, gold-shining basal callus. 
Height 4, greatest breadth 7, least br. 63 mill. 
Helicina solidula, Gray, in Zool. of Beech. Voy. p. 146, t. 38, f. 26; 
Sow. Thes. nu. 7, p. 3, t. 2, f. 52-54; Pfr. Ic. n. 18, p. 21, t. 2, 
f. 26-29; Pneum. Mon. p. 349. 
Hab. Elizabeth Island. 
23. HELICINA LENS. 
Shell small, lenticular, yellow above, reddish-brown beneath ; 
whorls 3, the last one keeled; spire flat-convex ; aperture 
dilated, orange within; labrum thick ; columella slightly cal- 
lous, yellowish. Length 3, breadth § inch. (Lea.) 
Helicina lens, Zea, Observ. i. p. 161, t. 19, f.56; Sow. Thes. t. 1, 
f. 48 (from Lea); Pfr. Pneum. Mon. p. 350. 
Hab. Feejee Islands. 
24, HELICINA CONSTRIATA. 
Shell small, lenticular, thick, rather smooth, not shining, opaque, 
whitish, painted with waving red lines; spire scarcely raised, 
blunt ; whorls 42, flattened, the last one angulated, somewhat 
turgid beneath, rather constricted near the aperture, which is 
