242 CATALOGUE OF PHANEROPNEUMONA. 
16. TRocHATELLA GRAYANA. 
Shell conoidally-globose, thin, slightly shining, uniformly yellow; 
spire short, conoidal, mucronate; whorls 53, enlarging rapidly, 
sculptured above with rather regular, crowded ridges, the two 
last ones convex, last whorl not descending, slightly keeled by 
a waving peripherical ridge, minutely concentrically striated 
beneath; aperture oblique, large, roundish-lunate; peristome 
simple, thin, white, broadly expanding, columellar margin 
dilated, reflected. Height 74, greatest breadth 10, least br. 
scarcely 8 mill. 
Helicina pulchella var., Sow. Thes. t. 1, f. 16. 
Trochatella Grayana, Pfr. in Z. f. M. 1848, p. 85; Ic. n. 5, p. 7, 
t. 5, f. 5, 6; Adams, Catal. 1849, et 1851; Pfr. Pneum. Mon. 
p. 336. 
Hab. Jamaica. 
17. TROCHATELLA SEMILIRATA. 
Shell conic-globose, solid, opaque, yellow, sculptured above with 
crowded white ridges; spire conic, rather pointed; whorls 5}, 
rather flat, the last one moderately convex, keeled, very mi- 
nutely concentrically striated beneath; aperture very oblique, 
nearly triangular; columella simple, passing immediately into 
the basal margin; peristome thickened, spreading angularly, 
with the margins united by an extremely thin callus, upper 
margin sinuate. Height 73, greatest breadth 103, least br. 8 
mill. 
Helicina semilirata, Pfr. in Proc. Z. S. 1848, p. 124. 
Trochatella semilirata, Pfr. in Z. f. M. 1848, p. 82; Jc. n 3, p. 5, 
t. 6, f. 15, 16; Pneum. Mon. p. 336. 
Hab. Venezuela (Mr. Linden). 
IiI. LUCIDELLA. 
Operculum membranaceous, semiovate, with the columellar margin 
scarcely thickened. Shell depressed, heliciform, not callous 
beneath; aperture sinuate, rather triangular; peristome thick, 
furnished with stout teeth. 
Lucidella, Gray, Syn. Brit. Mus. 1840, p. 134, 1842, p. 91; Proc. 
Z. 8. 1847, p. 182, n. 532; Pfr. in Z. £. M. 1847, p. 152, 1848, 
p. 82; le. Helicine, p.9; Pneum. Mon. p. 337; Petit, in Journ. 
Conch. 1851, 1. p. 85. 
Lucidella, Swains. Malacol. p. 330 (section of Lucernella). 
Helix spec., Féruss. Wood, Désh. 
Helicina sp., Gray, Zool. Journ. i. p. 70. 
