222 Transa ctio m. — Zoology . 



v., p. 89, pi. 22, f. 23 (1854); Gray, Figs/ Moll. Anim., iii., pi. 2G6, 

 f. 4 (named wrong) ; Tryon, Man. Conch., h\, pi. 51, f. 107 ; P. sqitamata, 

 Hutton, Jour, de Conch., 1878, p. 9 (jaw). 



Hab. Cook Straits to Stewart Island, Chatham Islands, Auckland 

 Islands. Found also in Tasmania, New South Wales, and Kerguelen's 

 Land. 



White, with eight or nine narrow spiral grooves, which are crossed by 

 thin varices. In the young the varices cross the ribs as well as the grooves. 



The operculum and dentition are figured in the Trans. N.Z. Inst., xv., 

 pi. xiii., f. b. 



Polytkopa scobina, Quoy and Gahnard, Voy. Astrolabe, Zool. hi., p. 5G7, 

 pi. 38, f. 12, 13 (1835); Tryon, Man. Conch., ii., pi. 51, f. 123 [not 

 Purpura scobina, Eeeve.] 



Hab. Bay of Islands to Auckland and Port Waikato. 



Distinguished by having three prominent scabrous ribs on the body 

 whorl. 



The dentition and operculum are figured in the Trans. N.Z. Institute, 

 xv., ph xiii., f. s. 



Polytropa albomarginata, Deshayes, in G-uermJs Mag. de Zool., 1841, 

 pi. 44; Tryon, Man. Conch., ii., pi. 51, f. 121. P. scobina, Keeve, Conch. 

 Icon., f. 72 (1846) [not of Q. and G.]. P. tristis, Dunker, Verhandl. Zool-bot. 

 Verein zu Wien, 1866, p. 910; and Eeise der Novara, Moll., p. 6, pi. 1, 

 f. 4 (1868). P. biconica, Hutton, Jour, de Conch., 1878, p. 20. 



Hab. Abundant throughout the South Island, and extending as far 

 north as Auckland. 



This is a very variable species, and at Auckland passes into the last. 

 Usually it is rough, but at Lyttelton it is sometimes quite smooth, even 

 polished, and of a yellowish-white colour, with ten or twelve low, spiral, 

 dark purple ribs. 



The dentition and operculum are figured in the Trans. N.Z. Institute, 

 xv., pi. xiii., f. t. 



Sub-Genus Lepsia, Hutton. 



Aperture ovate, rounded posteriorly, canal nearly obsolete, not recurved ; 

 columella excavated. Operculum as in the typical species of Polytropa. 



Polytropa haustrum, Martyu (Buccinum), Univ. Conch., pi. 9 (1784) ; 

 Quoy and Gaimard, Voy. Astrolabe, Zool. hi., p. 554, pi. 37, f. 4-5 ; Gray, 

 Figs. Moll. Anim., i., pi. 13, f. 2 and G ; Reeve, Conch. Icon., f. 6 ; Tryon, 

 Man. Conch., ii., p. 160, pi. 43, f. 25. 



Hab. Throughout New Zealand and at the Chatham Islands. 



Usually the interior is white, with a purple band round the mouth ; but 

 a variety occurs at Dunedin, in which the whole of the interior is yellow, 



