CEOCODILUS AETICEPS. 261 



Class R E P T I L I A. 



Order CROCODILIA. 

 Suborder EU8UCHIA. 



Eemains of Reptiles belonging to this group are fairly common both in the Qasr- 

 el-Sagha beds (Middle Eocene) and in the Fluvio-marine beds of the Upper Eocene. 

 From the former horizon remains of Tomistoma africanum and of a short-snouted species 

 of Crocodilus have been obtained, while from the latter a Tomistoma (T. gavialoides), 

 a long-snouted Crocodile (C articeps) and a short-snouted form (C. megarhinus) have 

 been collected. Scattered scutes, vertebrae, and other bones, sometimes in groups 

 probably belonging to a single individual, are of common occurrence ; but since none 

 of these have been found in association with the skull or mandible, their satisfactory 

 determination is difficult and may be deferred till better material is forthcoming. 



Family CEOCODILIDiE. 



Genus CROCODILUS^ Laurenti. 



[Synop. Rept. 1768, p. 53.] 



Crocodilus articeps, Andrews. 

 [Plate XXII.] 



1905. Crocodilus articeps, G. W. Andrews, Geol. Mag. [5] vol. ii. p. 481. 



Type Specimen. — Anterior portion of a well-preserved skull (PL XXII. figs. 1, 

 1 A, 1 b) ; Geological Museum, Cairo. 



This is a long- and narrow-snouted species, the length from the level of the front 

 border of the orbits being about two and a half times the width at the same point. 

 There are five premaxillary and sixteen maxillary teeth. The premaxillary region is 

 scarcely at all expanded. 



Form. (& Loc. — Fluvio-marine beds (Upper Eocene) : north of Birket-el-Qurun. 



The incomplete skull which is taken as the type of this species is the best preserved 

 of the crocodilian skulls collected by Mr. Beadnell from the Upper Eocene beds. 



