﻿22 G. and H. Nevill— 0;i Netv Marine MoUusca. [No. 1, 



CoNus (Cheltconus) peetiosus, n. sp. 



A single specimen of this lovely shell was dredged alive by Mr. Wood- 

 Mason at about 45 fths. ; it most resembles C. subulatus, K., from which it 

 can be distinguished by its more pyriform, elegantly produced shape, by its 

 being nearly perfectly smooth (on the under side only, on f rds of the last 

 whorl, are unusually distant, impressed grooves to be traced, and even these 

 are almost obsolete) ; in colour it is like Fig. 457 of the Thesaurus (C. spec- 

 trum) being white, throughout closely dashed with wavy, brown, slightly 

 pinkish splashes, these markings are somewhat larger and more distinct 

 on the spire, and also form two irregular bands on the body whorl ; 

 apex very sharp, spire much produced, composed of 14 whorls, acutely ang- 

 led in the middle (as in G. Malaccanus), above this angle spirally striated, 

 striae numerous, near the apex very slightly granular ; interior of the aperture 

 a beautiful pink, white near the margin ; epidermis thin, smoothish, compact. 



Long. 60 Mil., Diam. 25 Mil, Long. Apert. 48 Mil. 



Andamans. 



CoNUS (Chelyconus) Masoni, n. sp. 



This shell may prove to be the true C. muscosus of Lamarck, it cer- 

 tainly resembles most closely the shell figured by Keeve, PL XXIX, Fig. 

 167c, as the young of the West Indian C. characteristicus, Ch. and identified 

 by him as the variety named muscosus by Lamarck ; Mr. Wood- Mason 

 dredged at the Andamans, at a depth of 15 fths., ten living specimens of 

 this interesting species ; its affinity to the true West Indian O. characteris- 

 ticus is remarkable, but, besides its much smaller size and different habitat, 

 it can be distinguished by being more contracted at the base, by the apex 

 being very sharp and pointed instead of obtuse, by the two spiral grooves 

 being undulated, especially strongly near the apex, giving the shell 

 almost a coronated appearance ; the coloration, as remarked by Reeve, is 

 of a different pattern from that of typical C. characteristicus, being composed 

 of much broader flames, interspersed with more numerous and finer zig-zag 

 lines, and the spire, instead of being ornamented with rather numerous and 

 somewhat narrow brown markings, possesses few but very broad flames of 

 that colour ; there is also a very marked difference in tlie striae near the base : 

 in G. characteristicus these are more raised and rounded, as well as regularly, 

 though somewhat distantly, reticulated with brown and white, in our 

 East Indian species this reticulation does not exist, and these strise, espe- 

 cially the upper ones, instead of being raised are pricked in ; the epidermis 

 is thin, close and compact. 



Long. 25 Mil, Diam. 14^ Mil., Long. Apert. 2l\ Mil. 



CoNus (Rhizoconus) Setchellensis, n. sp. 

 Shell like G. JErminetis, Born, but constricted in the middle of the body 



