PLATE LVI, 



The shell which it now appears had constituted with Dr. 

 Solander the species Anomia cruenta, is very different from A. sangui- 

 nea, or any other of those with which it has been confounded; 

 In the annexed plate we have represented T. Cruenta in every 

 position that can be useful for the purpose of comparison and 

 elucidation. The front or anterior view is distinguished by a single 

 star ^, the double star J denotes the dorsal view, in which the deep 

 and ample longitudinal hollow of that valve is conspicuous ; the three 

 stars ^ the inside surface of the lower valve ; the four stars # t # the 



same in another position ; and the five stars # j # the inside of the 

 upper valve. 



From the different points of view in which Anomia cruenta is 

 placed in the annexed plate, it will be observed to be a shell of very 

 delicate texture ; it is a thin and fragile shell and somewhat dia- 

 phanous, the spots on the exterior surface being visible through its 

 substance. Those spots appear of a bright blood red, or rather the tint 

 of deeply-coloured sealing-wax on the outside of the shell ; within 

 the shell they appear of a paler red, they are however precisely the 

 same spots as those seen without, rendered visible through the sub- 

 stance of the shell, and therefore appear disposed in the same form 

 or pattern as on the exterior surface. 



This shell, which was long deemed unique, has certainly 

 occurred, though very rarely, to our observation in some few collec- 

 tions, and of a larger size than the shell before us ; indeed, in one in- 

 stance as large as the Anomia rubicunda represented in our plate ; but 

 as it is our object to offer the fullest explanation of the species in our 

 power, it was thought better to adhere in all respects to the original 



