T-EREBELLUM. OLIVA. TRIVIA. 97 



" C anniilus, the ring-cowry, has a yellow 

 mark round the top of the shell. The fowl- 

 cowry, C. moneta^ is used for money by the na- 

 tives of Siam and Bengal. 



'• C. pedictdus is changed to Trivia, a new 

 sub-genus from CyprcEa. We find the following 

 characters : —form of the columella internally 

 concave, ribbed ; shell sub-globular, cross- 

 ribbed. T. earned, flesh-coloured shell ; thin, 

 pure rose-coloured, with very thin, distant ribs ; 

 lips whitish : it has sometimes an indistinct 

 dorsal groove. 



" Trivia EuropcBa (Cyprcsa of authors) is a 

 globose shell, ash or flesh-coloured, with three 

 black dots and a whitish dorsal streak ; ribs close, 

 rather thick, and whitish ; base white ; outer 

 lip wide. The variety has the back without spots. 

 T. pedicuhis has six square dorsal spots ; the 

 colour of the shell pale red ; ribs rather thick- 

 covered ; dorsal line narrow ; base reddish. 

 Only one species, C. Europcea (or Trivia) is 

 a native of our shores. 



'' There are several fossil species of CyprcEa. 



" We now pass on to a genus in which there 

 is but one recent species, Terebellum subulatum^ 

 Bulla of Linna?us. (See Frontispiece ) A 

 fossil Terebellum is found in London clay. 



" The Oliva genus contains smooth, shining 

 shells, common, and therefore little valued ; 



F 



