954 



MR. D. M, S. WATSON ON A 



with the splenial. The splenial has a symphysis with its fellow 

 and is entirely a bone of the outer side of the jaw, as is 

 conclusively shown in specimen III. 



Text-fig. 165. 



Batrachiderpeton lineatum. Eiglit ramus of the lower jaw, outer aspect. X 2. 

 Outline and sutures from specimen III. 



Keference letters: — Ang., Angular; Den., Dentary ; Sp., Splenial; Sce.Ang., 



Suranarular. 



The complete jaws show extremely well a great patch of small 

 conical teeth lying inside those of the dentary. Specimen III. 

 shows conclusively that these do not belong to the dentary, the 

 splenial, the angular, or the ]3i'earticular, so that it is quite 

 certain that there is another element, which can only be the 

 coronoid. 



Text-fiff. 166. 



Batrachklerpeton lineatum. Left ramus of the lower jaw, inner aspect. X 2. 

 Drawn from specimens III., V., & VI. 



lleference letters as on text-fig. 165 with ; — Ce., Coronoid ; Pe.Aet., Prearticular, 



Between the coronoid, prearticular, and angular there is a small 

 vacuity, 



Fecto7~al girdle. 



Specimen III. retains both clavicles and a cleithrum. 



The clavicle is composed of a flat ventral plate with an orna- 

 ment of strong radiating ridges, from the upper surface of which 

 within the lateral border an almost cylindrical process rises 

 abruptly, this slopes slightly backwards and outwards and gives 

 attachment to the cleithrum. The dorsal surface of the ventral 

 plate of the clavicle shows clearly the impression of the part of 



