Cantharus.] GASTROPODA. 395 



10 on the body whorl, the interstices narrow, linear ; they are crossed 

 on the spire-whorls by flatly rounded axial ribs, about 12 on a whorl, 

 which usually cut up the spirals into squarish nodules. Colour white, 

 the spiral grooves purplish-brown ; a few longitudinal, narrow, light- 

 brown bands passing over the body-whorl and across the interstices 

 of the axial ribs ; aperture purple within ; outer lip and columella 

 white. Spire short, conic, about the same height as the aperture ; 

 outlines faintly convex. Protoconch very small, convex, of 1| smooth 

 whorls. Whorls 5, the last high, flattish ; base slightly contracted. 

 Suture not deep, uneven. Aperture somewhat oblique, narrowly 

 channelled above, produced below into a short, oblique, and narrowly 

 open canal, its base notched. Outer lip very thick, with a blunt edge 

 and a broad varix on the outside, inside callous, denticulate-lirate. 

 Columella vertical, lightly concave, with several ridges at its base. 

 Inner lip narrow, not distinctly bounded, extending over the concave 

 parietal wall, which has one or two tubercular plaits above ; at the 

 base the lip is narrowed towards the canal. Op&rculum unknown. 



Diameter, 10 mm. ; height, 18 mm. 



Animal unknown. 



Type in the Dominion Museum, Wellington. 



Hob. East Cape Lighthouse. 



Remarks. This shell was first shown to me by Mr. H. Hill, jun., of 

 Napier, who told me that the examples in his possession were collected 

 by the late Rev. W. Colenso, the exact locality being unknown. It 

 may well be that the species ranges from the East Cape down to 

 Hawke's Bay. 



Fam. ALECTRIONID.E3, Dall. 

 Nassidcp,, Swainson. 



Animal having a broad foot, with 2 slender posterior appendages ; 

 siphon long ; eyes on the outer sides of the tentacles. Radula triserial ; 

 central tooth arched, pectinated ; lateral teeth usually bicuspidate, but 

 sometimes with intermediate serrations, on the inner side with an 

 accessory plate. 



Shell ovate, spire usually elongated, aperture with a notch at the 

 base, without a canal ; columella usually twisted by a basal fold, but 

 sometimes there is no twist at all, or the columella is simply truncated. 

 Operculum small, corneous, ovate, with an apical nucleus and the 

 margins plain or serrated. 



Genus 1. ALECTRION, Montfort, 1810. 



Alectrion, Montfort, Conch. Syst., ii, 1810, 565. Type : Buccinum papil- 

 losum, L. Nassa, Lamarck, 1799 ; not of Bolten, 1798. Nassacites, 

 Krtiger. Nassina, Gray, 1847 (in part). N asscburna, de Greg., 1890. 



Animal having an elongated foot, truncated in front ; tentacles 

 moderately long ; siphon thin and long. Lateral teeth of radula 

 generally bicuspidate. accessory plates visible. 



