'I'nrritdlu.} GASTROPODA. 271 



whorls, but the median thread of the upper whorls usually diminishes 

 in strength, and some of the intercalated cinguli are getting a little 

 stronger ; sometimes, however, all the spiral lines are of nearly the 

 same strength on the last few whorls ; the acute keel of the body- 

 whorl is spirally striated ; base with about 15 flat spiral ribs, each 

 with 1 or 2 fine grooves ; the fine and deeply sinuated growth-lines 

 aie much more distinct on the lower whorls. Colour yellowish or 

 reddish-brown, faintly marbled with dark brown, the raised cinguli 

 usually of darker brown. Spire high, conic ; outlines straight. Proto- 

 conch minute, of 1 smooth globose whorl ; the first few whorls are 

 mostly broken off. Whorls about 16, first slowly then more rapidly 

 increasing, flat or but slightly convex ; base flat. Suture deep, but 

 sometimes it is not much impressed. Aperture subquadrate, interior 

 polished, yellowish, with numerous brown spiral bands. Outer lip 

 thin, sharp, with a deep and broadly rounded sinus in the middle, 

 drawn out together with the basal lip towards the keel of the body- 

 whorl, and forming a sharp point. Columella vertical, thin and sharp 

 below. Inner Up reflexed over the columella above, and forming a 

 thin polished glaze on the parietal wall. Operculum thin, horny, cir- 

 cular, multispiral. 



Diameter, 18 mm. ; height, 60 mm. (type) : angle of spire, 20-22. 

 Diameter, 20 mm. ; height, 69 mm. (specimen of 16 whorls). 



Animal with a proboscidiform muzzle, brown, spotted with black. 

 Tentacles moderately long, obtuse, white, with the sessile eyes near 

 their base. Foot quadrilateral, slightly broader in front, greenish or 

 yellowish, spotted with brown. Mantle fringed, with regularly dis- 

 posed whitish lunules. (Q. G.) 



Dentition. Hutton, T.N.Z.I., xv, 122, pi. 14, f. C. 



Type in the Mus. Hist, Nat,, Paris. 



Hob. Astrolabe Roads, Tasman Bay, in a depth of several fathoms, 

 type (Q. & G.) ; North and South Islands ; Chatham Islands. 



In my collection the species is represented from the following 

 localities : Port Pegasus, Stewart Island, in 18 fathoms (Captain 

 Bollons) ; Preservation Inlet ; Timaru ; Lyttelton Harbour, in 4 

 fathoms (H. S.) ; Tasman Bay, in 16 fathoms (Captain Bollons) ; 

 near Wanganui ; Narrow Neck Reef, Hauraki Gulf (H. S.) ; near 

 Channel Island, Hauraki Gulf, in 25 fathoms ; Bay of Islands. 



Remarks. Although the sculpture varies a good deal, the greater 

 number of specimens that came under my notice have on the lower 

 whorls 2 more conspicuous cinguli than the others, 1 above and 1 

 below ; between them there are 2 less-prominent threads, and 1 below 

 the suture ; the interspaces with unequal fine spiral threads. It is 

 only by dredging that perfect specimens can be obtained. 



Maori. Takavi (fide Quoy and Gaimard) ; kukukuroaroa (fill 

 Captain Bollons). 



Fossil in the Miocene and Pliocene. 



