264 CATALOGUE OF PHANEROPNEUMONA. 
57. HELICINA BULLA. 
Shell globose-conic, thin, sculptured under a lens with punctulated 
strie, scarcely shining, diaphanous, glassy-whitish ; spire 
middle-sized, conoidal, rather pointed; whorls 5, somewhat 
flattened, last rounded, slightly ascending anteriorly; colu- 
mella short, arcuate, terminating externally in a slight knot, 
diffused backwards into a very thin, glassy callus; aperture 
oblique, semiovate, rather triangular; peristome dilated, broadly 
expanded, with the upper margin very slightly sinuate. 
Height 82, greatest breadth 13, least br. 10 mill. 
Helicina bulla, P/r. in Proc. Z. S. 1852; Pneum. Mon. p. 364. 
Locality unknown. 
58. Huricina TAMSIANA. 
Shell subglobose-turbinated, thin, spirally and minutely striated 
under a lens, slightly shining, pellucid, horn-coloured-reddish ; 
spire conoidal, rather pointed; whorls 5, moderately convex, 
last obsoletely angulated, rather flattened beneath; aperture 
oblique, broadly semiovate; columella short, thread-shaped, 
somewhat receding, dilated backwards into a thin, whitish, dif- 
fused callus; peristome thin, white, angularly spreading, with 
the right margin dilated, basal margin rather narrow towards 
the columella. Height 6, greatest breadth 9, least br. 72 mill. 
Helicina Tamsiana, Pfr. in Z. f. M/. 1850, p. 192; Jc. n. 95, t. 10, 
f,9-11; Pneum. Mon. p. 365. 
Hab. Venezuela. 
59. HELICINA PELLUCIDA. 
“ A more transparent shell than H. zephyrina, with the columella 
nearly straight, and joining the outer lip at an angle.” (Sow.) 
Height 8, breadth 83 mill. 
Helicina pellucida, Sow. Thess. n. 40, p. 9, t. 3, £.138; Pfr. Pneum. 
Mon. p. 365. 
Hab. French Guiana. 
60. HELIcINA GLOBULOSA. 
Shell rather globose, smooth, white, with fuscous bands; spire 
short, blunt, inflated, with the apex acuminated; whorls 6, 
convex, the last large, globular; aperture semilunate; lip thin, 
slightly reflexed; basal callus occupying half the breadth of 
the mouth; anterior angle simple. Height 6, breadth 7 mill. 
(Orb.) 
Helicina globulosa, Orb. Moll. Cub. i. p. 254, t. 21, f. 10, 11; Sow. 
Thes. 0. 36, p. 8, t. 3, f. 127, 128; Pneum. Mon. p. 365. 
Hab. Cuba. 
