258 TERTIAEl VEETEBEATA OF THE EATtM. 



Class A V E S. 

 Order EATITtE. 



Genus EREMOPEZUS, Andrews. 

 [Proc. Zool. Soc. 1904, vol. i. p. 168.] 



The distal end of the tibio-tarsus is compressed from before backwards; there 

 is a well-marked intercondylar groove ; no bony bridge over the groove for the 

 extensor tendons is present. 



EremopezUS eoCaBnUS, Andrews. 

 [Text-fig. 84.] 



1904. Eremopezus eoccenus, C. W. Andrews, loc. cit. p. 168, text-fig. 15. 



Ty2>e Specimen. — The distal end of left tibio-tarsus (text-fig. 84) ; British Museum, 



Type and only known species ; about as large as the Khea. 



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



The only avian remains hitherto collected in the Fayum are the distal end of a left 

 tibio-tarsus and a doubtful phalange of the pes of a large Katite bird. The fragment 

 of the tibio-tarsus consists of the articular end and 4 or 5 centimetres of the shaft, 

 and so far as it goes is in good preservation, only the inner condyle being slightly 

 abraded. The outer condyle, the upper angle of which extends some distance up 

 the antero-external border of the bone, seems to be larger in proportion to the inner 

 than in the other Katites, vsdth the possible exception of Struthio. The condyles 

 are separated by a well-marked intercondylar groove, thus resembling the tibiae of 

 Casuarius and Bhea rather than those of ^pyornis and Struthio, in which the groove 

 is very shallow. The postcondylar prominences are small, being much less prominent 

 than in Struthio, but are developed to about the same degree as in Dromceus. The 

 outer postcondylar process does not extend so far upwards as does the condyle in front, 

 and is separated from this last by a sharp angle of about 90° (see text-fig. 84 B, a.), 

 which forms the distal end of the bone posteriorly ; the consequence of this arrangement 

 is that the articulation looks more forwards than is usually the case, though some 



