258 
TEKTiAEY VEHTEBEATA OE THE EAYCtM. 
Class A V E S. 
Order RATIT^. 
Genus EREMOPEZUS, Andrews. 
[Proc. Zool. Soc. 1904, aoI. i. ]). ICS.] 
'I'lie distal end of the tibio-tarsns 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 eoc^nus, Andrews. 
[Text-fig. 84.] 
1904. Ereinnpezii.'f eocceimi^, (J. W. Andrews, Joe. cif. ]>. 1C8, text-fi”'. 1.”). 
T/jpe specimen. — The distal end of left tibio-tarsns (text-iig. 84) ; British Museum. 
Type and only known species ; alrout as large as the Bhea. 
Form, d- Log. — Fluvio-mariue beds (Upper Eocene) : north of Birket-el-Quruu. 
The only avian remains hitherto collected in the FAyum are the distal end of a left 
tibio-tarsns and a doubtful phalange of tlie pes of a large Ratite bird. The fragment 
of the tibio-tarsns 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 StrutJiio. 'fhe condyles 
are sejiarated by a well-marked intercondylar groove, thus resembling the tibite of 
Ca.'^uarius and FJiea rather than those of FFpyornis and Ftrntldo, in which the groove 
is very shallow. The postcondylar ])rominences are small, being much less ]u-ominent 
than in Ftrufhio, but are developed to about tlie same degree as in Dromwus. 4'h(' 
outer’ postcondylar process does not extend so far ujrwards as does the condyle in front, 
and is separated from this last by a sharp aiigh' of about 90° (see text-fig. 84 B, a.), 
which forms tlie distal end of the bone posteriorly ; the consequence of this arrangenu'iit 
is that the articulation looks more foruards than is usually the case, though some 
