Melanopsis. MOLLUSCA. STROMBUSID.E. 359 
Gen. melanopsis. — C anal short, emarginate ; aperture 
produced, and ending in a gutter retrally ; outer lip entire ; 
pillar-lip callous. 
1. Is/L. fmiformis. — Fusiform in the middle, subcylindrical, smooth, mouth 
half the length of the shell — Sower. Min. Conch, t. cccxxxii. f. 1, 7* — Upper 
marine formation. Isle of Wight, &c. 
2. M. subulata — Conical-subulate, smooth ; mouth ovate, one-third the 
length of the shell. Sower. Min. Conch, t. cccxxxii. f. 8. — Along with the last 
species ; the relations of both imperfectly understood. 
3. M. carinata. Ovate, acuminated, with a sharp carina wound round the 
spire. Sower. Min. Conch, t. ccccxxiii. f. 1. — Fresh water formation. Isle of 
Wight and Cowes. 
4. M. brevis. Ovate, pointed, short ; whorls ventricose ; contracted in their 
upper parts; aperture oval; inner lip thick, callous, not very prominent, Sower. 
Min. Conch, ccccxxiii. f. 2. — Fresh water formation, Hampshire coast. 
STROMBUSIDJl. 
(Strombus.) 
(Pterocera.) 
Rostellaria. 
Gen. LXXXIII. RO STELL ARIA.-— Shell turrited; canal 
produced, and somewhat subulate ; lip entire or dentated, 
with the notch contiguous to the canal. 
354. R. Pes-pelecani . — Whorls ten, with tubercular spiral 
ridges, and fine striae ; outer lip quadrifid. 
Buccinum, List. Conch, t. dcccIxv. f. 20. t. Dccclxi. f. 21, 6. Strombus 
Pes-pelecani, Linn. Syst. 1207. Fenn. Brit. Zool. iv. 122. t. Ixxv. f. 94. 
Mont. Test. Brit. 253. In sandy bays. 
Length about two inches ; white, more or less tinged with brown ; whorls 
nearly flat, except in the middle, where the spiral tuberculated ridge runs ; 
the separating line is well defined ; the tubercles are oblong, transverse, and 
oblique. Besides the primary ridge, which extends over all the whorls, 
there are two or three on the base ; aperture narrow ; outer lip much expand- 
ed into three principal angular points, ridged on the back, and grooved in 
front, with a projecting wing retrally attached to the whorls ; canal shallow, 
subulate. Animal with a long pink, coloured snout, spotted with white ; ten- 
tacula filiform ; foot short, white ; eyes black at the base of the tentacula be- 
neath. 
EXTINCT SPECIES. 
1. R. lucida. Fusiform, longitudinally ribbed, transversely striated ; lip 
thick, with an obscure sinus at the inferior edge, and a very short channel at 
the superior ; beak straight, short. Sower. Min. Conch, t. xci. f. 1, 2, 3. Lon- 
don Clay. 
