PLATE XXL 
•'ig. 
J. J^rozeiKiJodon atrox, gen. et sp. nov. ; skull from above, (1 a) palatal view 
of right maxilla and premaxilla with teeth, (1 b) skull from side, 
(1 c) occipital surface, (1 d) temporal fossa and orbit seen obliquely from 
behind, the zygomatic arch being removed, (1 e) right ramus of mandible 
from outer side: one-third nat. size. Birket-el-Qurun beds, 1‘2 kilometres 
W.8.W. of Gar-el-Gehannem. 
al., alisphenoid. 
a.o.f., autorbital foramen. 
aH., articular region of mandible. (The dotted I 
line shows the point of union of this 
part of the mandible with that which j 
has been separated.) 
c., canine. j 
(viici., occi[)ital condyle. 
e.i'o., exoecipital. 
/., fossm for the reception of the points of 
the lower teeth. 
//•., frontals. | 
t. 1-3, incisors. 
./«•, jugal. 
/«., lachrymal. 
III. 1 , first molar. 
[Type specimen, C. 9319. J 
m.v., maxilla. 
iia., nasal. 
nar., external nares. 
o.u.f., orbito-nasal foramen. 
opt., optic foramen. 
os., orbitospheuoid. 
2)a., parietals. 
per., periotic. 
postgletioid 2)rocess. 
2d., palatine. 
pm. 1 - 4 , premolars. 
2>mx., premaxilla. 
soc., supraocci2)ital. 
Av/., squamosal. 
-pg., zygomatic process of the scjuamosal. 
