BUCCINID. 57 
Length, -75; breadth, ‘45; angle of spire, 54.° 
Dunedin. 
P. retiaria, Hutton; Jour. de Conch., 1878, ~. 20. Ovato-fusi- 
form; whorls keeled, spirally ribbed ; four or five ribs on the body 
whorl in front of the keel, and one small rib behind it; ribs crossed at 
regular intervals by transverse plications, dividing the surface of the 
shell into squares; the whole shell covered by delicate transverse 
foliations ; aperture oval ; columella rounded ; canal short, slightly bent; 
greyish-white ; interior purple. 
Length, ‘9; breadth, ‘5. 
Auckland. 
P. quoyi, Reeve ; Conch, Lc., f. 71; P. rugosa, Quoy and Gaimard, 
i, ~. 569, pl. 38, f 19-21. Shell somewhat fusiform, produced 
at each end ; whorls concavely depressed round the upper part, logitu- 
dinally very finely laminated, encircled with rough and scabrous ribs 
and ridges ; columella excavated; aperture small ; lip crenated within ; 
whitish or light brown ; interior of the aperture purple-brown. (Reeve.) 
Common in the North Island, not common in the South. 
A very variable species, probably a variety of the next. 
Animal green with yellowish-white spots; tentacles and siphon 
whitish (Quoy.) 
P. scobina, Quoy and Gaimard,; Voy. Astrol. LZool., ti., p. 567, 
Ll. 38, f. 12-13; Reeve, Conch. Ic., f. 72 (bad ;) P. tristis, Dunker, Reise 
der Novara Moll, pl. 1., f. 4. Shell ovato-oblong, transversely nbbed, 
rough ; yellowish-brown ; interstices with imbricating lamellz ; aperture 
oval, small, dark ; lip undulated, tuberculated within, sulcated ; spire 
conical, thick, subacute. (Quoy.) 
Auckland to Dunedin, abundant. 
A very variable species. 
P. patens, Hombron and Jacquinot; Voy. au Pole Sud. Molt., p. 
85, pl. 22, f. 1-2. Shell reddish-grey ; spire of fine whorls, of which the 
four first are very small; the last three times as large as the others 
taken together ; whorls ornamented with transverse threads, with regular 
intervals ; mouth reddish, broad, oval, the left lip turned back, and with 
granulations corresponding to the transverse threads; canal rather 
short, inclined to the right ; right lip very flat, diminishing towards the 
spire, and terminated by a reddish patch. (H. and J.) 
Length (from the figure), ‘85 inch. , 
P. biconica, Hutton; Jour. de Conch. 1878, p. 20. Small, 
broadly fusiform ; spire short, acute ; body whorl inflated posteriorly, 
and narrowed anteriorly; spirally ribbed, and slightly transversely 
plicated ; whitish, tessellated with dark brown on the ribs ; interior dark 
purplish-brown, toothed with white on the nght lip. 
Length, -4; breadth, -28. 
North Island. 
P. tesselliata, Lesson; Rev. Zool. Dec., 1840; Ann. d. Sct. Nat., 
Sertes 2, Vol. 16, p. 255 (Purpura.) Shell ovately-elongate, covered 
