TESTUDO AMMON. . 
283 
Tlie 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-d'ortoises in its comparative 
slenderness of shaft and the relatively slight expansion of its extremities. It is 
very like the humerus of T. pardalis, from which, 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) was found in association with a nearly complete shell 
(R. 3097) and, though not perfect, shows the following points: — the ilia {il.) are 
Text-fig. 90. 
Pelvis of Testudo ammon : A, from above ; B, from right side. 
acet., acetabulum ; il., ilium ; is., ischium ; 1 . 2 )., lateral process of pubis ; pubis ; 
sijm., ischial symphysis, g nat. size. 
short and broad, somewhat compressed from within outwards and thickening greatly 
at their upper ends. The pubes are incomplete at their symphysial end ; they 
bear strong lateral processes (l.p.) 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. ijardalis-, the chief difference is that in the latter species the ilia 
are relatively longer and more slender. 
C. 8130. Nearly complete, but somewhat distortcul, 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, [)late, and in Geol. Mag. [5] vol. i. 
2o2 
