102 STYLIFER. 
STRAPAROL’‘LUS. Mont. A genus containing some species of 
Helix, Auct. 
STREPTAX'S. Gray. Fam. Colimacea,Lam. Deser. Ovate or 
oblong ; when young sub-hemispherical, deeply umbilicated, with 
rapidly enlarging whorls. At length the penultimate whorl is 
bent towards the right and dorsal side of the axis, and the um- 
bilicus becomes compressed, and often nearly closed. The mouth 
lunulate, the edge slighty thickened and reflected, and often with 
a single tooth on the outer-side of the inner-lip. Ods. This 
genus of land-shells is separated from Helix, on account of the 
excentricity of the penultimate whorl. 5S. contusa, fig. 269. 
STRIATED. (Stria, a groove.) Marked with fine grooves or 
lines. 
STRIGOCEPH’ALUS. Defr. Pentamerus, Sow? Gypipia, Dal- 
man? 
STROM'BUS. Linn. Fam. Alatze, Lam. Angyostomata, Bl. 
Descr. Oblong, turrited, rather ventricose, thick; spire solid ; 
aperture elongated, terminating posteriorly in a short canal, and 
anteriorly in an emargination or truncated canal ; outer-lip when 
young, thin; when full grown, thickened and expanded, lobed 
at the spiral extremity, sinuated anteriorly near the caudal canal. 
Obs. This well known genus includes some species of immense 
size, commonly called Conch shells. Strombus is distinguished 
from Rostellaria, by the notch in the outer-lip, which in the 
latter genus, is close to the canal. Fig. 406, S. pugilis. 
STROPHOME'’NA. Rafinesque. Ortuis, Dalman. 
STROPHOS’TOMA. Deshayes. A fossil shell, in some degree 
resembling Anostoma, having the aperture reflected towards the 
spire. Fam. Colimacea, Lam. 
STRUTHIOLA’RIA. (Séruthio, an Ostrich.) Fam. Canalifera, 
Lam. Deser. Oblong, turrited, thick; spire turrited, composed 
of several angulated whorls; aperture oval, sub-quadrated, ob- 
lique; outer-lip thickened, reflected, advancing in the centre, 
receeding towards the extremities; inner-lip thickened, ex- 
panded over the columella and part of the body whorl. Obs. 
This singular genus, consisting of three or four recent species, 
is named “Pied d’Autruche,”’ by the French, on account of 
some resemblance in the outer-lip to the foot of the ostrich. 
Fig. 391, 5. straminea. 
STY’LIFER. Brod. (Stylus, a style; fero, to bear.) Descr. Thin, 
pellucid, turbinated; apex a little out of the perpendicular; 
aperture wide anteriorly, gradually narrowing towards the spiral 
extremity, where it terminates acutely. Obs. This is a genus of 
small, transparent shells, found burrowing in the rays of Star- 
fish. There are but two or three species at present known, one 
of which is elongated like Terebra, the other nearly globular. 
Fig. 12. Stylifer astezicola. 
