89 



SPIRIFER lotimdatus. 



TAB. CCCCLXl.— /^. 1. 



Spec. Char. Transversely obovate, gibbose, 

 longitudinally sulcated ; the middle of the 

 lesser valve elevated, convex, smooth ; beaks 

 approximating; hinge line less than the 

 width of the shell. 



An many respects this resembles the Spirifer pinguis, 

 tab. 171, but it is less rounded, and the elevated central 

 portion is not divided as in that species by a sulcus ; the 

 corresponding cavity in the other valve has several 

 obscure lines along it, and no central division, neither is 

 the general aspect of the shell so gibbose ; its edges are 

 jpore acute. 



By no means rare in the Black Limestone of Ireland, 

 where the shells are much incorporated with the stone, 

 and often distorted without appearing cracked. We 

 were favoured witb the specimen figured by S. Wright, 

 Esq. of Cork, who oljtained it in Limerick. 



