Melanopsis. MOLLUSCA. STROMBUSID^. 359 



Gen. MELANOPSIS.— Canal short, emarginate ; aperture 

 produced, and ending in a gutter retrally ; outer lip entire ; 

 pillar-lip callous. 



1. M.fusiformis. 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. 



STROMBUSID^. 



(Strombus.) 

 (Pterocera.) 

 ltostellaria. 



Gen. LXXXIII. ROSTELLARIA.— 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. Dccclxv. f. 20. t. Dccclxi. f. 21, 6. Strombus 



Pes-pelecani, Linn. Syst. 1207. Penn. Brit- Zool. iv. 122. t. lxxv. 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. tucida. 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. Soiver. Min. Conch, t. xci. f. 1, 2, 3. Lon- 

 don Clay. 



