18 



LUCINA divaricata. 



TAB. CCCCXVTI. 



Spec. Char. Orbicular, gibbose, marked with 

 two sets of oblique arched striae, and 3 or 

 4 deep lines of growth. 

 Syn. Tellina divaricata, hinn. 



Lucina divaricata, Lam. env. de PariSy 

 244. Hist. Nat. V. 541. 



X HIS round and almost globose shell, is rendered very- 

 remarkable by two sets of hollow lines that converge 

 towards each other, and meet upon the disk near the 

 posterior side, at an obtuse angle ; the shell is thick and 

 glossy, inside it is commonly dull, and partially granu- 

 lated. 



So exactly do the fossil specimens agree with recent 

 ones from the West Indies, that Lamarck considers 

 them the same, and we see no reason to differ from him 

 in opinion ; they are both liable to some variation, 

 especially in the fineness of the pattern : the recent 

 specimens are white. 



This pretty Hordwell fossil has been sometime in the 

 collection ; the addition of a very neat individual has 

 lately been made by the Rev. T. Cooke. 



It occurs also at Grignon and Bordeaux. 



The large figures are from Bordeaux specimens. 



