266 TERTIARY VEETEBRATA OF THE TATtM. 



as far as behind the fourth maxillary tooth, or further than in the recent forms with 

 which it has been compared. 



The anterior portion of a large mandible, probably belonging to this species, has 

 been found. As might have been expected from the longer premaxillary region, the 

 symphysis is more elongated than in C. porosus, C. paludosus, and C. niloticus, and 

 extends backwards to the level of the hinder border of the alveolus of the sixth 

 tooth; the splenial takes no share in its composition. The upper surface of the 

 symphysis is marked by a ridge along the line of junction of the two rami, while 

 its ventral surface is somewhat flattened. The anterior tooth is large ; it is 

 followed by three smaller ones, then comes the greatly enlarged fourth tooth, followed 

 by five smaller sockets. The two following teeth (10 and 11) are again very 

 large. 



R. 3327. Anterior portion o£ the ^nout. Type specimen described Geol. Mag. [5] vol. ii. p. 482. 

 Figured in text-fig. 85. The dimensions (in centimetres) of the specimen are : — 



Total length so far as preserved 50 



"Width of premaxillary expansion 15-6 



Width at notch for fourth lower tooth 12-2 



Distance from posterior border of nasal opening to tip of 



snout 11 



Distance from posterior end of facial processes of premaxillae 



to tip of snout 21-5 



Presented hy W. E. de Winton, Esq., 1903. 



R, 3328. Anterior portion of mandible. The length of the symphysis is 17 cm. 



Presented hy W. E. de Winton, Esq., 1903. 



E. 3104. Imperfect left ramus of mandible, probably of this species. 



Presented by ]V. E. de Winton, Esq., 1903. 



Crocodilus sp. 



From the Qasr-el-Sagha beds (Middle Eocene) some very fragmentary remains 

 of a broad-snouted Crocodile have been obtained, but the material is insufficient to 

 determine whether or not this is a new species. Possibly some of the vertebraj and 

 other bones enumerated under Tomistoma ufncanum should be placed here. 



The best-preserved fragment is the anterior portion of the left ramus of a mandible. 

 The symphysis extends to the level of the hinder border of the fourth tooth. The 

 first tooth is rather lai'ge, the second and third are small, while the fourth is greatly 

 enlarged and raised on a prominence of the alveolar border. Behind it are four 

 small teeth, then two large ones ; beyond this point the bone is broken away. 



