Dr. C. W. Andrews — Extinct Egyptian Vertebrates. 401 



age. In the present paper, merely very brief notices of some of the 

 more important new forms are given, but subsequently it is intended 

 by Captain Lyons to publish as complete an account as possible of 

 the geology and physical geography of the district, prepared by 

 Mr. Beadnell, with detailed descriptions of the fossil vertebrata 

 by the present writer. 



Mammalia. 



The mammalian remains obtained include a Sirenian probably 

 identical with Eotherium cegyptiacum from the Mokattam Hills, 

 described by Owen on the evidence of a brain-cast only ; Zeuglodon, 

 including apparently Dames' Z. Osiris, and perhaps a second species; 

 and, lastly, several ungulates which are new to science, and are the 

 subjects of the following notices. 



Palceomastodon Beadnelli,^ Andrews. (Fig. 1.) 



One of the most important specimens found in the higher beds 

 (probably Lower Oligoceue) is the nearly complete left ramus of the 

 mandible of a Proboscidean, which is in many respects similar to 

 •that of Mastodon angustidens, but belonged to a much smaller and in 



Fig. 1. — Left ramus of mandible of Palaomastodon Beadnelli. One -sixth natural 

 size. (A) From above ; (B) outer surface. 



several respects more generalized form. Kemains of M. angustidens 

 (or a very closely allied form)^ were found by Mr. T. Barron and 



' " Tageblatt des V Internationalen Zoologen- Congresses," Berlin, No. 6, 

 August 16th, 1901, p. 4. 



- Remains of a small Mastodon from the Lower Miocene (Cartenmen) neai- 

 Isserville (Kabylie), Algiers, have been described by Deperet (Bull. Soc. Geol. 

 France, ser. iii, torn, xxv, 1897, p. 518) under the name Mastodon angustidens, var. 

 pygmaus. The teeth from Moghara, though slightly smaller than specimens from 

 Sansan, are not sufficiently so to justify their reference to this small variety. 

 Moreover, there seems to have been little or no cement in the valleys of these teeth, 

 while in Deperet' s specimen it was abundant. 



DECADE IV. VOL. VIII. — NO. IX. 26 



