HELICINIDE. 229 
Stoastoma pisum, Adams, Mon. p. 11; Pfr. in Z. f. M. 1850, 
p- 59; Pnewm. Mon. p. 320; Petit, in Journ. Conch. 1851, i. 
p. 83, t. 2, f. 5. 
Hab, Jamaica. 
3. SroastoMA LINDSLEYANUM. 
Shell perforate, conoidal, sculptured with crowded distinct spiral 
ridges, which are unequal in the upper part of the last whorl, 
opaque, brownish-whitish ; spire conic, pointed; whorls 5, 
scarcely convex, the last one rounded, flattened beneath; aper- 
ture perpendicular, semioval; peristome simple, continuous, 
with the right margin not dilated, basal margin continued into 
a sharp lamella, which is somewhat ascending near the per- 
foration. Height 2%, greatest breadth 3, least br. 23 mill. 
Stoastoma Lindsleyanum, Ad. Mon. p.12; Pfr. in Z. f. M. 1850, 
p. 60; Preum. Mon. p. 320. 
Hab. Jamaica. 
4, Stoastoma LEANUM. B. M. 
Shell subperforate, globose-conic, diaphanous, wax-coloured, with 
very crowded spiral strize under the lens ; spire exactly conical, 
rather pointed; whorls not quite 5, moderately convex, the last 
one rounded, with a punctiform perforation beneath; aper- 
ture nearly perpendicular, oval; peristome simple, continuous, 
straight, with the right margin scarcely dilated, columellar 
margin slightly arcuate; basal angle obsolete, continued into a 
very small lamella. Height scarcely 2, greatest breadth 23, 
least br. 2 mill. 
Stoastoma Leanum, Ad. Mon. p. 15; Pfr. in Z. f. M7. 1850, p. 60; 
Preum. Mon. p. 321. 
Hab. Jamaica. 
5. SroastomA REDFIELDIANUM. B. M. 
Shell perforate, conic, rather thin, diaphanous, greenish-yellow, 
with crowded prominent ridges; spire exactly conical, pointed ; 
whorls 45, moderately convex, the last one rounded, shortly 
detached anteriorly, rather deflected, dilated, bell-shaped; aper- 
ture perpendicular, semioval; peristome simple, continuous, 
with the right margin somewhat crenulate, basal margin slightly 
arcuate ; basal angle continued into a raised lamella. Height 
13, greatest breadth 2, least br. 12 mill. 
Stoastoma Redfieldianum, Ad. Mon. p.13; Pfr. in Z. f. I. 1850, 
p. 60; Pneum. Mon. p. 321. 
Hab. Jamaica, 
