Hutton. — On Ehachiglossate Mollusca. 221 



Kalydon inferus, Hutton; Cat. Marine Moll, of N.Z., p. 9 (1873). 



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 1-1 

 inch ; breadth *7 inch. 



Sub-fam. Purpurince. 



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, Bruguiere, 



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 succincta, .Martyn, Univ. Conch., pi. 45 (Buccinum) (1784) ; 

 Eeeve, 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 textiliosa, Lamarck, Anim. sans Vert. (1820) ; Quoy and 

 Gaimard, Voy. Astrolabe, Zool. ii., p. 552, pi. 37, f. 1-3 ; Gray, Figs. Moll. 

 Anim., i., pi. 14, f. 6 ; Eeeve, Conch. Icon., f. 6Q ; Tryon, Man. Conch., ii., 

 pi. 51, f. 119 and 125. 



Hab. Auckland to Cook Straits. Found also in S. Australia (?). 



Eibs and grooves with smaller ridges ; or if uniform in size, they are 

 shallow and close. The dentition and operculum are figured in the Trans. 

 N.Z. Inst., vol. xv., pi. 13, f. p. The operculum 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. Operculum oval, with the 

 nucleus sub-lateral. 



Polytropa striata, Martyn (Buccinum), Univ. Conch., pi. 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. Pole Sud, Zool, 



