167 



TEREBRATULA plicatella. 

 TAB. Dill.— Jig. 1. 



Spec. Char. Subglobose^ rather square, plaited ; 

 front elevated ; beak small, with a broad ob- 

 long* concave space on each side ; plaits 40, 

 rounded. 



1 EN or twelve of the plaits rise gradually with the 

 front ; the descending sides are rather straight, which, 

 with the flattish spaces on each side of the beak, give the 

 whole a squarish outline : the plaits are often branched 

 near the beaks, so that they were less numerous in the 

 young shell. 



Upon plate 244 of the Encycl. Methodique (fig. 2) is 

 represented a Terebratula * that much resembles the one 

 before us; but it has a much less number of plaits, and is 

 in this respect more like the following : they all have 

 the remarkable space on the sides of the beaks. 



The cabinet of H. T. De la Beche, Esq. is enriched 

 with this probably scarce fossil : it is from the inferior 

 Oolite at Chideock near Bridport. 



* Lamarck Hist. Nat. vi. Part I. 253, refers to this as T. 

 tetraedra, considering it the same as T. tetraedra of Min. Con. 

 t. 83, /. 4, which he also quotes ; but which is a totally different 

 shell. 



