STEREOGENYS CROMERI. 
301 
R. 3190. IinpcrL'ect skull, wanting roof of right temporal fossa and with palate much crushed. The 
dimensions (in centimetres) of this specimen are : — 
Extreme length in middle line 11-4 
„ „ from posterior end of squamosals .... 11-6 
Greatest width 11 app. 
Width between the ends of the ectopterygoid processes . . . 7’6 
,, of palate 4-9 
Distance from internal nares to tip of nose 5-8 
Least width between the orbits 2 
Py'esented hy the Egyptian Government, 1904. 
C. 10031. Nearly complete skull, wanting portions of the covering of the temporal fossae and the 
left quadrate. The dimensions (in centimetres) of this specimen are : — 
Extreme length in middle line 10-4 app. 
„ „ from posterior ends of squamosals .... 11'5 
Greatest width 10-3 app. 
AVidth between ends of ectopterygoid processes 7'2 
„ of palate 4'3 
Distance from internal nares to tip of nose 5-7 
R 3189. Imperfect skull, wanting the whole of the temporal arches and roof. Figured on 
PI. XXV. fig. 1. 
Extreme length in middle line 10 + 
AVidth of palate 4'2 
Distance from internal nares to tip of nose 5-8 
Presented hy the Egyptian Government, 1904. 
R. 3202. Posterior portion of two skulls, probably of young individuals of this species. The only 
notable difterence observable between these and the type skull is, that the quadrate 
articulation is less markedly pedunculate. Presented hy W. E. de Winton, Esq., 1903. 
C. 10039. Carapace and plastron, somewhat crushed and much coated with gypsum. This specimen 
was described and figured in Ann. & Mag. Nat. Hist. [7J vol. xi. (1903) p. 119, pi. viii. 
fig. 1 (reproduced in text-fig. 9G). The dimensions (in centimetres) of this specimen 
are : — 
Carapace : 
Greatest length 47’5 
Length in middle line 4.5 
Greatest width (increased by crushing) 41 
Length of nuchal bone 7 app. 
AVidth of nuchal bone O’oapp. 
Plastron : 
Greatest length 44 
Length in middle line 41‘6 
,, of bridge 20-5 
,, of anterior lobe ll'o 
Width of anterior lobe 24 
Length of posterior lobe 15 app. 
AVidth of posterior lobe 24 
