268 PEOCEEDINGS OF THE MALACOLOOICAL SOCIETY. 



Shell globosc-oonie, narrowly perforate, cinereous, spirally g-rooved, 

 cingxili dark-puiple Avitli white spots at regular distance. Columella 

 not very thick, obtusely dentate below, white -edged. Umbilico- 

 columellar area bright- green with undulating narrow bands of purplish- 

 brown. Alt. 17, diam. 16-18 mm. 



The only specimen I have, measures 9 x 12 mm., having 3'5 whorls 

 only ; the apex is not eroded, protoconch smooth, dark-orange. 



rilsbry states that it is sometimes imperforate. 



Hah. — xiuckland, on Zostera beds; scarce (T. F. Cheeseman). 



Genus CANTHARIDTJS, Montfort, 1810. 

 Subgen. Cantharidus, Montf. 



Sect. CANTHARIDUS, S.S. 



16. CANTnAEiDTJs lEis (Gmelin). 



Trochus iris, Gmelin: Syst. Kat., 13th ed., p. 3580, 'No. 86. 

 Cautharidus iris (Gmel.) : Hutton, Man. New Zealand Moll., p. 99 ; 



Hutton, Proc. Linn. Soc. New South Wales, vol. ix, p. 361. 

 Cantltiridns Zealandicus, A. Adams: Proc. Zool. Soc, 1851, p. 109. 

 Cantharidas ZeaJandiais, A. Ad. : Hutton, Man. New Zealand Moll., 



p. 99. 

 Cantharidiis iris (Gmel.) : Pilsbry, Man. Conch., ser. i, vol. xi, p. 122, 



pi. xxxiv, fig. 15. 



Shell elevated, conical, obtusely angular at the periphery, whitish 

 with longitudinally undulating purplish-red streaks ; obsoletely lirate, 

 about five separated narrow ridges on the base. The largest species of 

 the genus. Alt. 40, diam. 30 mm. 



I follow Hutton in placing Adams' Cantharidus Zealandicus as 

 a synonym of this species, Pilsbry taking it as a synonym of 

 C priminus (Gould), which I do not think to be correct. 



JIah. — Auckland to Cook Strait ; Chatham Is. 



17. Canthaeidus peuninus (Gould). 



Trochus pruni7)ns, Gould : Proc. Boston Soc. Nat. Hist., vol. iii (1849), 



p. 90; U.S. Explor. Exped., Moll. p. 180, fig. 205; Otia, 



p. 55. 

 TrocJms capillaccus, Philippi : Zeitschr. f. Malak., 1848, p. 102. 

 Trochus ejjiscojjus, Hombr. & Jacq. : Voy. Pole Sud, Zool. vol. v, p. 55, 



pi. xiv, figs. 9-11. 

 Cantharidas cpiscopus (Hombr. & Jacq.) : Hutton, Man. New Zealand 



MolL, p. 100. 

 Cautharidus 23rmiinus (Gould) : Hutton, Proc. Linn. Soc. New South 



Wales, vol. ix, p. 361. 

 Cantharidus pruinimis (Gould) : Pilsbry, Man, Conch., ser. i, vol. xi, 



]). 122, pi. xlvi, figs. 60, 61. 



