Hurrox.—On Rhachiglossate Mollusca. 221 
Karxpox rerus, Hutton, Cat. Marine Moll. of N.Z., p. 9 (1878). 
Hab. Stewart Island and Chatham Islands. 
Perhaps a variety of the last species, but broader, the longitudinal ribs 
more irregular or obsolete, and the aperture strongly angled and shorter 
than the spire. The dentition and operculum are unknown. 
In the Manual of the Mollusca of New Zealand, 1880, there is a mistake 
in the description of this species, all the words after “ bent to the left,” in- 
cluding the dimensions, should be omitted, as they have got in from the 
description of Siphonalia dilatata. The real dimensions are, length 11 
inch; breadth :7 inch. 
Sub-fam. Purpurine. A 
Shell with the spire usually short; the canal short or reduced to a notch ; 
the columella more or less flattened. Operculum with the nucleus lateral 
or sub-lateral. 
Genus Purpura, Bruguiére, 
Spire short; aperture patulous with an oblique notch at the anterior 
end, and a less distinct posterior canal. Operculum semi-cordate with the 
nucleus lateral. 
Purpura sucomorA, Martyn, Univ. Conch., pl. 45 (Buecinum) (1784) ; 
Reeve, Conch. Icon., Purpura, f. 23; Tryon, Man. Conch., ii., p. 51, 
f. 118. 
Hab. Auckland to Nelson. Found also in New South Wales. 
Deeply grooved, the ribs and grooves smooth, without any smaller 
raised ridges. 
The operculum and dentition are not known. 
Purpura rExTILIOSA, Lamarck, Anim. sans Vert. (1820) ; Quoy and 
Gaimard, Voy. Astrolabe, Zool. ii., p. 552, pl, 87, f. 1-8; Gray, Figs. Moll. 
Anim., i., pl. 14, f. 6; Reeve, Conch. Icon., f. 66; Tryon, Man. Conch., ii., 
pl. 51, f. 119 and 125. | 
Hab. Auckland to Cook Straits. Found also in $. Australia (?). 
Ribs and grooves with smaller ridges; or if uniform in size, they are 
shallow and close. The dentition and opereulum are figured in the Trans. 
N.Z. Inst., vol. xv., pl. 18, f. ». The opereulum has also been figured by 
Quoy. 
Genus Polytropa, Swainson. 
Shell with the spire acuminate; the aperture narrowed anteriorly ; the 
canal small and oblique; no posterior canal. Opereulum oval, with the 
nucleus sub-lateral. 
"  PorrrRopa striata, Martyn (Buccinum), Univ. Conch., pl. 7 (1784) [not 
| Purpura striata, Q. and G.]; P. rugosa, Lamarck, Anim. sans Vert. (1820) 
[not P. rugosa, Q. and G.]; P. rupestris, Valenciennes, Voy. Póle Sud, Zool, 
