258 
TEETIAEl VEETEBEATA OF THE YAYXJM. 
Class A V E S. 
Order RATIT^. 
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 eocsenus, Andrews. 
[Text-fig. 84.] 
1904. Eremoj^ezus eoccenus, C. W. Andrews, loc. cit. p. 168, text-fig. 15. 
Tifpe Specimen. — The distal end of left tibio-tarsus (text-fig. 84) ; British Museum, 
Type and only known species ; about as large as the Rhea. ^ 
Form. & Loc. — Fluvio-marine beds (Upper Eocene) : north of Birket-el-Qurun. 
The only avian remains hitherto collected in tlie Fayum are the distal end of a left 
tibio-tarsus and a doubtful phalange of the pes of a large Ratite 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 Ratites, with the possible exception of Struthio. The condyles 
are separated by a w^ell-marked intercondylar groove, thus resembling the tibiic of 
Casuarius and Rhea rather than those of FEpyornis and Struthio, in Avhich the groove 
is very shallow. The postcondylar prominences are small, being much less ])rominent 
than in Struthio, but are developed to about the same degree as in Dromceus. The 
outer postcondylar process does not extend so fiir ujnvards as docs 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 
