72 CATALOGUE OF PHANEROPNEUMONA. 
8. Yellow or reddish, sometimes banded (Pfr. Jc. t. 8, f. 22). 
Helicina Ambeliana, Sow. Thes. t. 1, f. 19. 
fab. Texas. 
Perhaps identical with the following species ? 
83. HELICINA ORBICULATA. B. M. 
Shell subglobular; spire not prominent, but more than convex, 
lateral line somewhat convex; whorls 5, obsoletely striated 
across, regularly rounded; colour pale-greenish, yellowish, or 
slightly tinted with reddish, particularly on the body, and 
margined above by an obsolete white line, on the middle of the 
body a white vitta revolves, sometimes obscure or wanting ; aper- 
ture acute above, regularly rounded at the base, and extending 
from the centre of the revolutions or base of the column, to an 
equidistance between the base and apex of the spire; base of 
the columella slightly projecting into an obtuse angle; ex- 
terior lip whitish, reflected. Operculum simple, not spiral, 
yellowish-brown, minutely granulated. Length + inch. (Say.) 
Olygyra orbiculata, Say, in Philad. Journ. i. p. 283; Amer. Conch. 
t. 46, f. 1-3; Hd. Chenu (Bibl. Conch. iii.), p. 56, t. 15, f. 2, 
2a, 2e. 
Helicina orbiculata, Llainv. in Dict. Sc. Nat. xx. p. 456? Gray, 
Zool. Journ. i. p. 70; Pfr. Pneum. Mon. p. 375. (Not Sowerby.) 
Hab. East Florida (Say). 
84, HeuticiInA HANLEYANA. 
Shell globose-conic, rather solid, sculptured with somewhat dis- 
tant impressed concentric striz, scarcely diaphanous, shining, 
fulvous-flesh-coloured; spire shortly conoidal, rather blunt ; 
whorls 5, scarcely convex, last rounded, slightly descending 
anteriorly; aperture little oblique, nearly semicircular; colu- 
mella extremely short, terminating outwards in a small tooth, 
dilated backwards into a thin, whitish, diffused callus; peri- 
stome white, imperceptibly expanded, slightly thickened in- 
ternally, passing into the tooth of the columella. Height 53, 
greatest breadth 73, last br. 64 mill. 
Helicina Hanleyana, Pfr. in Proc. Z. S. 1844, p. 122; Jc. n. 45, 
p- 38, t. 9, f.7, 8; Pneuwm. Mon. p. 375. 
Hab. New Orleans (Sallé). 
85. HELICINA FLAVIDA. 
Shell globose-conic, concentrically minutely striated, opaque, 
white or yellow, uniform or reddish towards the summit, often 
painted with red bands; spire elevated, rather pointed; whorls 
6-63, rather flattened, last not descending anteriorly, flattened 
