OCR Text |
Show 1874.] MR. G. B. SOWERBY ON N E W SPECIES OF SHELLS. 599 linear chestnut spots at the edge; columella covered with a smooth polished transparent enamel; canal very short, recurved. Hab. Hongkong. A single specimen of this very beautiful species was dredged by William Cuthill, Esq., in the vicinity of Hongkong. A specimen of it in the old collection of the British Museum had been inadvertently confounded with Triton Sowerbyi (Reeve), from which it is obviously distinct. The shell presents characters common to several species, but differs from all its congeners in the form of the whorls being more rounded, and in the smoothness of the mouth. Its nearest analogue is perhaps T. testaceus (Morch), from which it differs in the last whorl being larger, the mouth more open, and the spire more acute. It differs in the same respects from T. clathratus (Sowerby), besides being much more finely cancellated. 2. OVULUM SINENSE, sp. nov. (Plate LXXII. figs. 1, 1 a.) O. testa pyriformi, ventricosa, antice subattenuata, utrinque sub-rostrata, tenuiuscula, subpellucida, alba, linea aurantiaca ad marginem cincta, transverse obsolete striatula, striis longitudi-nalibus irregularibus obscure decussata; apertura subpatula, arcuata, intus lactea ; columella superne caltoso lirata, inferne subexcavata, ad canalem valide uniplicata ; labia externa den-ticulato : long. 30, lat. 19, alt. 13. mill. Shell pyriform, ventricose, somewhat attenuated posteriorly, slightly beaked at both ends, rather thin, semitransparent, white, encircled with an orange line at the margin, very obscurely decussated ; aperture rather wide, arched, milk-white within ; columella with a thickened ridge at the upper part, somewhat excavated below, with a strong plait at the canal; outer lip denticulate. Hab. Hongkong (Cuthill, two specimens). There is a specimen of this species also in the British Museum, which was placed with O. adriaticum, from which it differs considerably in form and structure, being much stronger and more ventricose. 3. STROMBUS ROBUSTUS, sp. nov. (Plate LXXII. figs. 3, 3 a.) S. testa conica, solida, ventricosa, caruleo-alba, castaneo zonata et maculata; spira parviuscula acuta; anfractibus noduloso-angulatis, superne spiraliter striatis ; anfractu ultimo in medio fere lavi, deinde versus marginem conspicue striato, ad basin sulcato ; apertura elongata, canali superne spiram ascendente ; columella callosa, alba, obsolete lirata; labio externo emargi-nato, intus lirato : long. 48, lat. 31 mill. Far. (3 testa luteo-fusco fasciata. Shell conoid, solid, ventricose, bluish white, banded and blotched with dark brown; spire rather short, acute ; whorls angulated and noduled at the angle, spirally striated above ; last whorl almost smooth in the middle, then towards the margin conspicuously striated, grooved at the base; aperture elongated, with a canal at the upper part, running up the spire; columella furnished with, a thickened white enamel, which is faintly ridged; outer lip emarginated; interior ridged. |