MOLLUSCOUS ANIMALS. 
Ill 
Tritonium tenerum. 
Shell ovate, turreted, thin, pale, fulvous, pellucid, cancellated, with equal fine longitudinal and spiral 
ridges ; spire attenuated, longer than the mouth ; whorls rounded, varices rounded, cancellated, with two 
brown spots. Mouth ovate, oblong, outer lip crenulated, throat smooth, inner lip thickened, smooth, ele- 
vated, canal short, perforated in front. Axis 3f inches. 
Inhab. 
Allied to T. maculosum , but thinner and cancellated. 
Tritonium caudatum. 
Bucc. caudatum. Gmel. — Martini, f. 1053. 
Cassidaria cingulata. Lam. 
Inhab. Indian Ocean. 
Tritonium pileare. Lam. 
Var. The shell ventricose, the spire about two-thirds the length of the mouth ; whorls ventricose ; and 
lips smooth, black, white plaited ; otherwise exactly like the common state of the species. Length 2 inches. 
POLLIA. n. g. 
This genus contains several shells, which have been scattered into various genera, but which all appear 
to have a common character. Their mouth has much the appearance of Triton , but they have many varices, 
and therefore cannot he ranged with that genus. The inner lip is generally crossed by a few plaits in front. 
POLLIA SCABRA. t. 3 6./. 16. 
Triton scaber. Brod. and King, Zool. Jour. v. 348. 
Shell ovate, oblong, solid, white, covered with a brown, bran-like periostracum, with hairy lines over the 
spiral ridges ; spire conical, as long as the mouth, whorls rather convex, rapidly enlarged, concentrically 
waved, regularly and closely spirally ridged, with the ridges widening and becoming subnodose over the 
cross folds. Mouth ovate, oblong, white, outer lip with nine or ten small distant single conical protube- 
rances on its inner side, the columellar lip with short ridges behind, and conical tubercles in front; canal 
short, wide. Axis 23. Diam. 13. Mouth 13 lines. 
Inhab. Coast of Chili. Mr. Fryer. 
Pollia TROCHLEA. Favanne, t. 97. /. D. 
Shell ovate, fusiform, ventricose, white, smooth, with deep, distant spiral grooves ; the spire rather 
shorter than the mouth, conical ; whorls rounded, produced behind over a very deep broad spiral sutural 
groove ; outer lip very obscurely grooved ; inner lip thickened, smooth, with three or four very oblique plaits 
in front. Axis If inch. 
Inhab. 
Pollia spiralis. 
Shell ovate, solid, thick, white, brown-streaked, spire as long as the mouth ; whorls with a deep groove 
at the suture ; upper with three or four, and last with nine to twelve rather large flat-topped compressed 
spiral ridges, sub-angular and strongly transversely plaited behind ; mouth white, outer lip cTenulated, throat 
grooved ; inner lip smooth. Axis, slightly perforated, inch. 
Inhab. 
This is a very common shell, but I do not find it described. 
