TOMISTOMA APEICANUM. 



271 



portion, showing that the quadrate articulation was almost simply cylindrical as in 

 Gharialis, and not saddle-shaped' as in Tomistoma schlegeli. 



The teeth are twenty in number on either side, and the first and fourth are 

 somewhat larger than the others. Behind the fourth there are two smaller sockets, 

 then the alveoli are larger and remain about the same size till close to the hinder end 

 of the series, where the last two or three decrease in size. With the exception ot 

 larger gaps between the second and third and the third and fourth teeth, they are all 

 about equidistant from one another. The alveoli have prominent borders and open 



Text-fig. 86. 



B.i 



Anterior portion of snout of Tomistoma africanum, with the upper and lower jaws in their natural 

 relation to one another : A, from right side ; B, from above. 



1-5, premaxillary teeth, i nat. size. 



rather more outwards and forwards than in Tomistoma schlegeli. There seem to be no 

 pits for the reception of the points of the upper teeth. 



This mandible is referred to a species of Tomistoma on account of the comparatively 

 small number of teeth in the jaw as a whole, 20 on each side, and the number (14) in 

 the symphysial region. In T. schlegeli there are 20-21 teeth in all, 14 or 15 being 

 in the symphysial portion of the jaw : in Ghar-ialis, on the other hand, there are 25-26 

 teeth, of which 23-24 are symphysial. The dimensions of the type specimen are 

 eiven below. 



