The Extinct Animals of Egypt. 269 



was about the size of a Tapir, and had a nearly complete Eutherian 

 dentition. 



This was followed in point of time by Palceomastodon, represented 

 by four species, the largest, F. beadnelli, being about the size of 

 a half-grown Indian elephant. The next form, Tetrabelodon 

 migustidens, preceded the advent of the Mastodon, which, in its turn, 

 was replaced by the true elephants of later Tertiary and modern 

 times. 



The position of Barytheriim in relation to the other Ungulates is 

 still uncertain. It suggests relationship to Uintatherium and to the 

 Pyrotheriidas, but more remains are probably needed in order to 

 speak with certainty as to its affinities. 



In the Faytim the Sirenia are represented by one genus only, 

 Eosiren, but in the earlier Mokattam Hills, near Cairo, other and 

 more primitive types occur. There seems considerable evidence in 

 favour of de Blainville's view that they are intimately related to 

 the Proboscidea. 



Dr. Andrews has also worked out some interesting details in 

 regard to the Zeuglodonts of the Fayum. These,' taken in con- 

 nection with a species Protocetus ataviis (described by Professor 

 E. Fraas) from the limestone of Mokattam, form a complete 

 transitional series, as regards their dentition, from the Creodonts 

 to the true Zeuglodonts. In Prozeuglodon the canine is distinctly 

 larger than the teeth before and behind it, and the premolars have 

 inner buttresses, supported by a third root. 



Numerous figures and descriptions of Egyptian Vertebrates have 

 already appeared in the Geological Magazine ; namely, in 1902, 

 pp. 433-439, PI. XXI ; 1903, pp. 225, 337, 529, 531 ; 1904, 

 pp. 109, 157, 211, 481, 528 ; 1905, p. 562. It is not therefore 

 necessary to enter more fully into details concerning them here. 



The work is illustrated by a fine series of 26 quarto plates (and 

 a frontispiece of the skull of Arsinoitherium) ; and, what is also of 

 very great value, no fewer than 98 very carefully prepared text- 

 figures giving most accurate details of the bones, teeth, and parts of 

 the skeletons, by Miss G. M. Woodward, whose name also appears 

 on fourteen of the plates, the remainder being executed by Mr. A. H. 

 Searle and Mr. J. Green. 



In conclusion, we must express our admiration for the way iu 

 which the author has completed this very splendid monograph, the 

 outcome of long and careful study of the great series of remains 

 obtained during four Winters spent by himself in the Fayum, iu 

 addition to those obtained by Mr. H. J. L. Beadnell for the 

 Egyptian Geological Survey, which are likewise incorporated in the 

 present work. The Trustees of the British Museum, the Egyptian 

 Government, and the Survey Department may also be congratulated 

 upon the successful issue of this joint memoir, which will un- 

 doubtedly greatly advance our knowledge of the evolution of the 

 Tertiary Vertebrates, more especially of the Proboscidea, the Sirenia, 

 and the Zeuglodonts, whose past history was so obscure. 



