TESTUDO AMMON. 



283 



The coronoid fossa is deep. From side to side the articulation is slightly convex on 

 its radial side, slightly concave on the ulnar. 



This bone differs from that of the other giant Land-Tortoises in its comparative 

 slenderness of shaft and the relatively slight expansion of its extremities. It is 

 very like the humerus of T. pardalis, from v?hich, however, it is distinguished by the 

 greater prominence of the ulnar and radial crests, by the more dorsal position of the 

 deep muscle-impression above referred to, and the presence of a deep ectepicondylar 

 canal perforating the bone. 



A pelvis (text-fig. 90) vi^as found in association vrith a nearly complete shell 

 (E. 3097) and, though not perfect, shows the following points : — the ilia (^7.) are 



Text-fig. 90. 



Pelvis of Testudo ammon : A, from above ; B, from right side. 



acet., acetabulum ; il., ilium ; u., ischium ; Z.j)., lateral process of pubis ; pw., pubis ; 

 sym., ischial symphysis. 



g nat. size. 



short and broad, somewhat compressed from within outwards and thickening greatly 

 at their upper ends. The pubes (pu.), are incomplete at their symphysial end ; they 

 bear strong lateral processes (l.ja.) projecting downwards, outwards, and forwards. 

 The ischia (is.) are complete ; they form a strong median symphysis {sym.), and are 

 greatly thickened ventrally both posteriorly and on the middle line, where the bone 

 seems to have been strengthened by cross-buttresses. In the middle line the posterior 

 border of the combined ischia is deeply notched ; the ischial tuberosities bordering 

 the notch turn slightly upwards. The acetabulum {acet.) is large, shallow, and roughly 

 triangular in outline. This pelvis, as a whole, particularly in the form of the ischia, 

 is very like that of T, pardalis ; the chief difference is that in the latter species the ilia 

 are relatively longer and more slender. 



C. 8130. Nearly complete, but somewhat distorted, carapace and plastron, probably of a male. 

 Type specimen described and figured in 'A Preliminary Notice of a Land-Tortoise 

 from the Upper Eocene of Egypt ' (Cairo, 1903), p. 5, plate, and in Geol. Mag. [5] vol. i. 



2o2 



