118 MR. G. B. sowERBY, JUN., ON [Jan. 17, 



Although a shell of uo 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 IG, 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, strise undulating across the ribs and forming thereon 

 minute scales ; ribs closer, stronger, and smoother towards the base ; 

 spire rather short, regularly conical ; whorls 1 0, flatly sloping, un- 

 dulated 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. 



An interesting species of peculiar sculpture, the waved striae 

 crossing the ribs giving them more of a scaly than of a nodulous 

 appearance. 



CoNTTS wiLMERT, sp. Bov. (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 strife ; spire very elevated, whorls 1 1, 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 acutangitlus (Ch.),with a very elevated spire. 



MiTRA MELViLLi, sp. nov. (Plate V. fig. 7.) 



Shell cylindrically fusiform, encircled throughout with deeply 



