BY PROFESSOR F. W. HUTTON, F.G.S. 355 



Genus. Turiso. Linne. 

 Turbo smaragdus. Martyn, Univ. Conch., pi. 73, 74 (1784); 

 Chemnitz, Conch. Cab. V., fig. 1815 and 1816; Quoyand 

 Gaimard, Voy. Astrolabe, Zool. III., p. 219, pi. 60, fig. 6-8 ; 

 Gray, Figs. Moll. Anim., pi. 38, fig. 1 ; Reeve, Conch. 

 Icon., fig. 13. 

 Habitat. — Auckland to~Dunedin. 



Shell blackish green covered with a brown epidermis ; inside 

 white, the mouth and operculum stained with green. Outer 

 surface of operculum smooth. 



Variety, tricostatus. Hutton (1884). 

 Habitat. — "Wellington to Dunedin. 

 Body whorl, with three spiral ribs. 



The dentition is figured by Troschel in Gebiss den Schnecken 

 II., pi. 19, fig. 1, and also in the Trans. N.Z. Institute, XIV., 

 pi. 7, fig. G. 



Sub-genus. Modelia. Gray. 



Turbo granosus. Martyn, Univ. Conch. Trochus, pi. 37 (1784) ; 

 T. rubicundus, Reeve, Conch. Icon., fig. 11. 



Habitat. — Dunedin and Foveaux Straits ; Auckland Islands ; 

 Chatham Islands. 



Shell with spiral moniliform ribs, the umbilical region im- 

 pressed, callous. Reddish purple varied with white. 



The operculum is figured by Adams in Genera of Recent 

 Mollusca III., pi. 43, fig. 5a-5b. The dentition is figured by 

 Hogg in the Trans. Micro. Soc, 1866, pi. 11, fig. 51. 



Sub-genus Callopoma. Gray. 



Turbo shandi. Hutton. Catalogue Marine Moll, of N.Z., 

 p. 35 (1873). 



Habitat. — Chatham Islands. 



Shell with three smooth spiral ribs near the periphery, with two 

 or three nodulous ribs both above and below. "White spotted with 

 reddish or purplish brown. 



As the operculum and dentition are unknown, the position of 

 this species is doubtful. 



