130 



The left ramus in a restored condition is represented in Fig. 8, Plate VIII, 

 one-half the natural size. 



The lower jaw belonged to a larger animal than the cranial specimen from 

 Little Sandy River, and probably pertained to a different species. The form 

 of the jaw is much like that of the mugger, but is of more robust proportions. 

 The rami, in their dentary portions, are much thicker in proportion to their 

 depth, and the symphysis is of greater extent, in this respect presenting a 

 greater resemblance to the condition in the American crocodile. 



The dentary portions of the rami the greater part of their length are as 

 thick and thicker than the depth. Half way between the symphysis and the 

 median enlargement of the dentary portion of the ramus the thickness is over 

 2 inches, while the depth is £ of an inch less. In the position of the enlarge- 

 ment just mentioned, the thickness is 2 inches and 2 lines, while the depth 

 is only 2 lines more. The symphysis has measured about 4| inches fore and 

 aft, and but slightly more than this transversely opposite the position of the 

 large canine-like teeth. 



The splenial bone, as if to give greater strength to the ponderous jaw, 

 extends close up to the symphysis. The outer portion of the jaw in the posi- 

 tion occupied by the teeth, is more rounded than in the mugger. The back 

 portion of the jaw in form and constitution appears to agree with that in the 

 mugger. The outer surface of the jaw, strongly foveated back of the large 

 oval foramen, presents the usual vascular grooved and perforated appearance 

 in advance. 



About eighteen teeth occupied each ramus of the jaw, but all are broken 

 from the specimen except one. Some of the broken and detached teeth 

 accompany the jaw. They appear to have been comparatively robust, short, 

 and blunt, conical in form, and but feebly curved. The enameled crown is 

 rugose and longitudinally grooved, but not properly fluted; the narrow grooves 

 separating wider convex and rugose longitudinal ridges. They sufficiently 

 differ from those in the jaw-specimen referred to Crocodilus Elliotti to per- 

 tain to a different species. 



The end of the symphysis of the jaw or of the chin is broken away, so that 

 nothing can be ascertained in regard to the first pair of teeth of the two 

 rami. A large tooth, canine-like in its relative position and size, as usual in 

 the crocodiles, was number four in the series. The socket, occupied by 

 green-sand matrix, is about 10 lines in diameter. The expansion of the sym- 



