rODOCNEMIS ANTI QUA.— PODOCNEMIS EAJUMENSTS. 
291 
are almost exactly as in P. madagascariensis. None of the boundaries between the 
epidermal shields are visible. 
From Fodocnemis stromeri described from the same horizon by Iteinach, the present 
species is differentiated, according to that writer, in the following ])oints : — 
(1) Shortness and relatively mnch greater breadth of the shell. 
(2) Different form of the siirface of the carapace. 
(3) Broader and shorter iinchal 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. antigua. 
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 of 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 4 app. 
„ bridge 8 app. 
AVidth of posterior lobe 8‘5 
Length of posterior lobe 7’8 
Podocnemis fajumensis, Andrews. 
[Text-figs. 93, 94.] 
1903. Podocnemis fajumensis, C. AV. Andrews, Ann. & Mag. Nat. Hist. [7] vol. xi. p. 121, pi. viii. 
fig. 2 c. 
1903. (?) Podocnemis hlancJcenliorni, A. von Heinach, Abhandl. Senckeuberg. 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. 
9 p 9 
-J 1 u 
