269 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. 
Shell ovate-conical, deep purple, apex pink; surface nearly smooth, 
densely, finely, spirally striate all over. Last whorl rounded, or 
obtusely angular. Aperture less than one-half the length of the 
shell, iridescent within with finer dense folds. Columella subvertical, 
expanded in a callous pad over the umbilicus. Relative length of 
spire very variable. Alt. 22, diam. 16mm. ; alt. 19, diam. 16mm. ; 
alt. 30, diam. 19mm. 
Hab.—Auckland Is.; Campbell Is. 
Var. perobtusa, Pilsbry. 
Man. Conch, ser. 1, vol. xi (1889), p. 123, pl. xxxiv, fig. 1. 
Spire short, very obtuse at the apex, whorls 5, the last large, 
descending anteriorly. Aperture as long as the spire; other characters 
as in C. pruninus—(Pilsbry). Alt. 20, diam. 19mm. 
Hab.—Auckland Is.; Campbell Is.; Macquarie Is. 
Mr. A. Hamilton, of Dunedin, collected specimens on the latter 
island; some are dark-purple, others cinereous. 
18. CanrHARIDUS TENEBROSUS, A. Adams. 
Canthiridus tenebrosus, A. Ad.: Proc. Zool. Soc., 1851, p. 170. 
Cantharidus tenebrosus, A. Ad.: Hutton, Man. New Zealand Moll, 
p. 101; Hutton, Proc. Linn. Soc. New South Wales, 
vol. ix, p. 661; (?) Hutton, Trans. New Zealand Inst., 
vol. xiv, p. 166, pl. vii, fig. L (radula); Pilsbry, Man. 
Conch., ser. 1, vol. xi, p. 123, pl. xxxiv, fig. 3. 
Shell conical, elevated, bluish-black or cinereous, 6-7 spiral lire on 
the penultimate whorl, 13-16 on the body-whorl, the latter bluntly 
subangular at the periphery. Columella covering the umbilicus. 
Alt. 11°5, diam. 9°5 mm. 
Hab.—Throughout New Zealand. On seaweeds. 
Var. Huttonii, KE. A. Smith. 
Trochus ( Cantharidus) Huttonii, EB. A. Smith: Journ. Linn. Soc., (Zool.) 
vol. x1 (1876), p. 558, pl. xxx, fig. 20; Hutton, Man. 
__ New Zealand Moll., p. 100. 
Cantharidus tenebrosus var. Huttoni: Hutton, Proc. Linn. Soc. New 
South Wales, vol. ix, p. 862 ; Hutton, Trans. New Zealand 
Inst., vol. xiv, p. 165, pl. vii, fig. M (radula); Puilsbry, 
Man. Conch., ser. 1, vol. xi, p. 123, pl. xxxiv, fig. 2. 
Gibbula plumbea, Hutton: Journ. de Conch., 1878, p. 33. 
Shell short, conical, bluish-black, 8-11 spiral lire on the penultimate-, 
babu on the body-whorl. Columella covering the umbilicus. Alt. 9, 
lam. 7mm.; alt. 14°5, diam. 105mm.; alt. 15, diam. 13mm, 
(specimen from Dunedin). 
fab.—The same as the type, but more plentiful. 
