I’LATE XXL 
ProzeiKjhdon atrox, gen. et sp. nov. ; skull from above, (1 x\) palatal view 
of right maxilla and })remaxilla with teeth, (1 b) skull from side, 
(! c) occipitiil surface, (1 d) tem[)oral fossa and orbit seen obliquely from 
l)ehind, the zygomatic arch being removed, (1 e) right ramus of mandible 
from outer side: one-third nat. size. Birket-el-Qurun beds, 12 kilometres 
^V.S.^Y. of Gar-el-Gehanuem. [ J^'ype specimen, C. 9319.] 243 
((/., alisplieiioitl. 
ti.o.f; autorbital foramen. 
ar(., articular re”;iou of mandible. (The dotted 
line shows the poiiit of union of this 
])art of the mandible with that which 
has been separated ) 
f., canine. 
coikL, occipital condyle, 
f.fo., exocci[)ital. 
fosste for the rece[)tion of the points of 
the lower teeth. 
//•., trontals. 
. l-B, incisors. 
J"; JLigh. 
III., lachrymal. 
III. 1, tirst molar. 
in.v., ma.xilla. 
iia., nasal. 
liar., external nares. 
o.ii.f., orbito-nasal foramen. 
opt., optic foramen, 
c.s-., orbitos[)henoid. 
2 >(i., parietals. 
per., periotic. 
pgl., [)ostglenoitl process. 
pi., palatine. 
pm. 1-d, premolars. 
jimv., premaxilla. 
soc. , s n p raocci p i tal . 
ti'p, S(jLiamosal. 
r//y., /.ygoinatic [U'ocess of the scjuamosal. 
