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Show 118 MR. G. B. SOWERBY, JUN., ON [Jan. 17, Although a shell of no very striking form, and having characters in common with several, there is no species to which I can very closely compare it. The spire is rather like that of C. punctatus, Hwass; but it is a much more slender shell, and the painting is quite of a different character. CONUS SEMIVELATUS, sp. nov. (Plate V. fig. 3.) Shell pyriform, plum-colour, white at the top ; spire short; whorls slightly convex, smooth ; last whorl rounded at the upper angle, then convex, and contracted at the base. Aperture moderate, purple within. Length 16, width 10 millim. Hab. Red Sea. A remarkable little species, of a very unusual colour. The whole of the spire and just the top of the last whorl is plain white, and the rest of the shell of a uniform plum-colour. The specimen is in perfect condition; and its operculum, which is preserved, is very small and thin. Mr. Melvill gave the shell the above name in manuscript in his collection. I have seen two other specimens, varying very little from the type. CONUS DIANTHUS, sp. nov. (Plate V. fig. 4.) Shell rather abbreviately conical, pale pink, with irregular patches of orange; transversely rather distantly ribbed, longitudinally faintly striated, striae undulating across the ribs and forming thereon minute scales ; ribs closer, stronger, and smoother towards the base ; spire rather short, regularly conical; whorls 10, flatly sloping, undulated at the angle, last two or three with a concave depression just above the angle ; the last whorl has the upper angle obscurely coronated, sides nearly straight, or very slightly convex. Aperture rather narrow, a little wider towards the base, pink within. Lip very little sinuated at the upper extremity. Length 28, width at the angle 13 millim. A n interesting species of peculiar sculpture, the waved striae crossing the ribs giving them more of a scaly than of a nodulous appearance. CONUS WILMERI, sp. nov. (Plate V. fig. 5.) Shell fusiform, pale brown, transversely ribbed, ribs strong, rounded, smooth, equal in width to the interstices, which are crossed with thread-like striae ; spire very elevated, whorls 11, flatly sloping with three deep-cut spiral grooves, keeled at the angle, a spiral cord against the suture ; last whorl with the upper angle acutely keeled, sides sloping, and attenuated towards the base. Aperture narrow. Lip slightly sinuated at the upper extremity. Length 21, width 8 millim. Hab. Port Blair, Andaman Islands (Lieut.-Col. Wilmer). Much narrower than C. acutangulus (Ch.),with a very elevated spire. MITRA MELVILLI, sp. nov. (Plate V. fig. 7.) Shell cylindrically fusiform, encircled throughout with deeply |