65 



PINNA granulata. 



TAB. CCCXLVII. 



Spec. Char. Broad, nearly equilateral, convex, 

 obscurely decussated, with a small elevation 

 in the centre of each division ; anterior side 

 rounded. 



A. BROAD shell, particularly thick about the anterior 

 side and edge ; there is a rounded longitudinal eleration 

 towards the posterior side which makes some fragments 

 resemble those of a Mytilus ; the length of the specimen 

 figured is 8| inches, the Avidth 6. 



Some time ago I was shewn fragments of this shell 

 from the Kimmeridge Clay, near Weymouth, and mis- 

 took them for parts of Mytilus amplus, (M. Con. t. 27.) 

 which by the bye is surely a Pinna, by Prof. Sedgwick. 

 The specimen figured being much more perfect has set 

 me right I trust ; it is in the cabinet of Mr. De la Beche, 

 who obtained it at Weymouth. 



