222 Transactions.—Z oology. 
v., p. 89, pl. 22, f. 28 (1854); Gray, Figs. Moll. Anim., iii., pl. 266, 
f. 4 (named wrong); Tryon, Man. Conch., ii., pl. 51, f. 107; P. squamata, 
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., 
pl. xiii., f. R. 
PoLyrropa scoBINA, Quoy and Gaimard, Voy. Astrolabe, Zool. iii., p. 567, 
pl. 88, f. 12, 18 (1885); Tryon, Man. Conch., ii, pl. 51, f. 123 [not 
Purpura scobina, Reeve.] 
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., pl. xiii., f. s. 
PoLYTROPA ALBOMARGINATA, Deshayes, in Guerin's Mag. de Zool., 1841, 
pl. 44; Tryon, Man. Conch., ii., pl. 51, f. 191. P. scobina, Reeve, Conch. 
Icon., f. 72 (1846) [not of Q. and G.J. P. tristis, Dunker, Verhandl. Zool-bot. 
Verein zu Wien, 1860, p. 910; and Reise der Novara, Moll., p. 6, pl. 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, 
Yv. PL MUL, L 2. 
Sub-Genus Lepsia, Hutton. 
Aperture ovate, rounded posteriorly, canal nearly obsolete, not recurved ; 
columella excavated. Operculum as in the typical species of Polytropa. 
Poryrrora Haustrum, Martyn (Buccinum), Univ. Conch., pl. 9 (1784); 
Quoy and Gaimard, Voy. Astrolabe, Zool. iii., p. 554, pl. 37, f. 4-5; Gray, 
Figs. Moll. Anim., i., pl. 13, f. 2 and 6; Reeve, Conch. Icon., f. 6; Tryon, 
Man. Conch., ii., p. 160, pl. 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. 
