CLANCULtJS. 279 



G. 9571. Cast of a smaller species, with rounded base and 

 plain whorls. Eocene : Trelissick, New Zealand. 



Sir James Hector Coll. 



Genus CLANCULTJS, Montfort. 

 [Conch. Syst. t. ii. 1810, p. 191.] 



Shell conical or turbinate, usually spirally granose both on 

 the whorls and base; last whorl keeled or subangulate at the 

 ])eriphery ; falsely umbilicate; aperture oblique; outer margin 

 dentate or Urate within ; inner margin with a deutiforni fold 

 posteriorly, and a prominent tooth in front. 



Type. — Trochus pharaonicus^ Linnaeus. 



ClancTilus variegatus, A. Adams. 



1851. Clamtdus variegatus, A. Adams, Proc. Zool. Soc. p. 160. 



1878. Clanculus variegatus, Tenison- Woods, Pap. Roy. Soc. Tas. 1877, 



p. 40. 

 1880. Clanculus variegatus, Hutton, Man. X.Z. Moll. p. 95. 



Shell depressed, conical ; whorls ornamented with spiral rows 

 of granules, last whorl acutely keeled at the periphery ; base 

 almost flat, spirally gi-anulate; columella twisted posteriorly 

 where it enters obliquely one side of the false umbilicus, margin 

 crenulated, furnished with a biplicate prominent denticle 

 anteriorly. 



Bimetisionfs. — Length 12 mm.; breadth 16 mm. 



Form, and Loc. — Post-Pliocene : Limestone Creek, Glenelg river, 

 Victoria. 



G. 5568. Four specimens of the adult. Purchased. 



Genus THALOTIA, Gray. 



[Proc. Zool. Soc. 1847, p. 145.] 



Shell imperforate, elevated, conical, whorls spirally granulate 

 or lincate ; peripheiy of last whoil subangular; aperture ovate; 

 outer margin crenulate within, columella truncate, can-ying a 

 small denticle in front. 



Type. — Trochus pictus, Gray. 



