BY PROFESSOR F. W. nUTTON, F.G.S 361 



Gantharidtjs iris. Gmelin, after Walch in Naturforscher IV., 

 p. 42, pi. 1, figs. 5-6 (1774). Trochus iridis. Chemnitz 

 Conch. Cab. V., figs. 1522-23 (1781). Trochus vpalm, 

 Martyn, Univ. Conch, pi. 24 (1784). Canth zealandicus, 

 Adams, Pro. Zool. Soc. of London, 1851, p. 169. 

 Habitat. — Auckland" to Cook's Straits, Chatham Islands. 

 Shell elevated, smooth, spirally streaked ; periphery more or 

 less angled. Pinkish purple with longitudinal zig-zag reddish 

 markings. 



The young shell is perforated but the perforation gets covered 

 over. The dentition is not known. 



Cantharidt7S purpuratus. Martyn, Univ. Conch, pi. 68, fig. 2 

 (1784). Trochus elegans, Gmelin in Linne Syst. Nat. 13th 

 edition. Phasinella rubella, Menke, Synops. Moll. (1530.) 

 Trochus texturatus, Gould, Pro. Bost. Soc. Nat. III., p. 90, 

 (184.S). Trochus pallidus, Hombron and Jacquinot, Voy. 

 Pole Sud., Zool. V., p. 55, pi. 14, figs. 12-13, (1854). 

 Habitat. — Auckland to Banks' Peninsula. 

 Shell elevated, imperforate, spirally ribbed and striated, the 

 surface roughened with growth line. Pinkish white, streaked or 

 spotted with pinkish brown. 



The dentition is figured in Trans. N.Z. Institute, XV., pi. 14 

 fig. o. 



Cantharidus PRtrNiNTJS. Gould, Otia Conch., p. 55, (1846). 

 Trochus episcopus, Hombron and Jacquinot, Voy. Pole Sud., 

 Zool. V., p. 55, pi. 14, figs. 9-11, (1854.) 

 Habitat. — Auckland Island and Campbell Island. 

 Shell elevated, imperforate, suture impressed ; whorls finely 

 and equally spirally ribbed. Blackish purple, columella and 

 aperture white or reddish, interior highly iridescent. 

 The dentition is not known. 



Cantharidus tenebrosus. Adams, Proc. Zool. Soc. of London 

 1851, p. 170. Giblula plumbea, Hutton, Jour, de Conch., 

 1878, p. 3. 

 Habitat. — Throughout New Zealand. 



