PODOClSrEMIS ANTIQTTA,— PODOCNEMIS FAJUMENSIS. 291 



are almost exactly as in P. madagascariensis. None of the boundaries between the 

 epidermal shields are visible. 



From Podocnemis stromeri described from the same horizon by Eeinach, the present 

 species is diiferentiated, according to that writer, in the following points : — 



(1) Shortness and relatively much greater breadth of the shell. 



(2) Different form of the surface of the carapace. 



(3) Broader and shorter nuchal and the presence of a pair of foramina behind 



it and on each side of the first neural, which is not longer than the second. 



(4) The sutures between the epi- and hyoplastrals are different in form. (In 



this connection it should be noticed that the sutures in the type specimen 

 are not clearly visible on the outer face of the plastron.) 



(5) The xiphiplastrals form the longest suture in the middle line. 



(6) The suprapygal is of a different shape. 



From this it will be seen that the two species are certainly distinct, though some 

 of the differences may perhaps be due to the distortion through crushing, and others 

 to the immaturity of the type specimen of P. antiqtia. 



C. 10038. Carapace and plastron of a probably young individual, much crushed and coated with 

 gypsum. Type specimen described and figured in Ann. & Mag. Nat. Hist. [7] vol. xi. 

 (1903) p. 120, pi. viii. figs. 2 a, b (reproduced in text-fig. 92). The dimensions of 

 this specimen are : — 



Length of carapace 20'2 



Approximate width ot carapace 19 



Width of nuchal bone 5 



Length of nuchal bone 3'2 



„ neural series in straight line 12 



„ plastron . , 18'5 



Width of anterior lobe 10 



Length of anterior lobe 4app. 



„ bridge 8 app. 



Width of posterior lobe 8'5 



Length of posterior lobe 7"8 



Podocnemis fajumensis, Andrews. 



[Text-figs. 93, 94.J 



1903. Podocnemis fajumensis, C. W. Andrews, Ann. & Mag. Nat. Hist. [7] vol. xi. p. 121, pi. viii. 



fig. 2 0. 

 1903. (?) Podocnemis hlanchenliorni, A. von Reinach, Abhandl. Senckenberg. naturf. Gesell, 



vol. xxix. pt. 1, p. 27, pi. ix. 



Type Specimen. — Anterior portion of a plastron, with the sutures and grooves well 

 defined (text-fig. 93) ; Geological Museum, Cairo. 



2p2 



