444 Dr. C W. Andrews — Extinct Egyptian Vertebrates. 



the material is fully examined it is probable that two or three 

 species will be found. At present it will only be necessary to 

 mention one, to which the finest specimens collected are referable. 

 These include an almost perfect mandible and the anterior portion 

 (about 34 cm. in length) of a snout, with the upper and lower jaws 

 in their natural positions with regard to one another. 



In the mandible the symphysis is very long and Gavial-like, but 

 in this region there are only 14 teeth on each side, the total number 

 in each ramus being 19-20. The splenial enters largely into the 

 formation of the symphysis. The first and second teeth are large, 

 the third smaller, the fourth large again, then the remainder some- 

 what smaller, and of nearly the same size throughout except a few 

 of the hindermost. 



There are four premaxillary teeth, of which the second and third 

 are the largest ; the fourth is small, and behind it there is 

 a diastema into which the large fourth lower tooth bites. Only the 

 ^rst four of the maxillary teeth are preserved. The teeth are nearly 

 circular in section. The premaxillary region is very slightly 

 flattened and expanded, and the nasal opening is heart-shaped, with 

 the point directed backwards : the relations of the premaxillaries 

 and nasals to it cannot be made out, none of the sutures being 

 visible. 



Comparison of this Crocodile with other types shows that without 

 doubt it is referable to the genus Tomistoma, the only living species 

 of which occurs in the rivers of the Malay Peninsula, Borneo, and 

 the neighbouring islands, while fossil representatives, or very closely 

 allied types, occur in the Miocene of Malta and Eggenburg. 



This species differs from the recent form in the slightly greater 

 expansion of the premaxillary region and the somewhat greater 

 length and slenderness of the articular process of the mandible. 

 Apart from these and some other peculiarities, the difference in the 

 horizon and locality of this form entitles it to specific distinctness ; 

 it may be called Tomistoma africanum. 



The dimensions of the mandible are : — 



cm. 



Totallengtli 103 



Length of symphysis ... ... ... ... ... 49"5 



Width of jaw at symphysis 11"2 



"Width of articular surface for quadrate 6*8 



Depth of ramus at symphysis (approx.) 4*2 



In another specimen of the front of the snout the premaxillary 

 expansion is nearly 8 cm. wide, while the somewhat contracted region 

 immediately behind the premaxillary teeth is only 5 cm. in width. 



Pisces. 

 Fish remains were collected in considerable quantity, but have not 

 yet been examined in detail ; they seem to be mostly portions of the 

 skeleton of large Siluroids, but remains of a Saw-fish (? Fropristis 

 Schweinfurthi, Dames) are not uncommon, one complete rostrum 

 being; obtained. 



