PLATE XXV. 
Pig. Page 
1. Stereogcnys Andrews ; imperfect skull, from side : nat. size. Qasr-el- 
Sagha beds (Middle Eocene). [R. 3189.] 295 
2. Ditto ; skull, palatal view : nat. size. Same horizon. 
3. Ditto ; mandible, from above and (3 a) from 
nat. size. Same horizon. 
4. Thalassochelys lihyca, Andrews ; posterior 
two-thirds nat. size. Same horizon. 
ancj., angular process of mandible. 
art., articular surface of mandible. 
hoc., basiocci])ital. 
cor., cormioid process of mandible. 
ec.pt., eetopferygoid process of pterygoid. 
e.n., external nares. 
ep.o., epiotic. 
e. vo., exoccipital. 
f., frontal. 
f. c.i., internal carotid foramen. 
f.s., foramen sphenoidale. 
<j., gi oove leading to inner side of orbit. 
i.n., internal nares. 
iii.g., groove on side of mandible for muscle- j 
attacbmenl. 
[Type specimen, C. 10027.] 295 
side ; associated with type skull : 
[Type specimen, C. 10027.] 298 
portion of skull, from behind : 
[Type specimen, C. 10029.] 287 
m.r., maxilla. 
0.0. , opistbotic. 
or. , orbit. 
pa., parietal. 
pi. , palatine. 
premaxilla. 
po.f., postfrontal. 
pr.f., prefrontal. 
pt., pterygoid. 
(p, quadrate. 
HOC., supraoccipital. 
sq., squamosal. 
sum., symphysis of mandible. 
t.o., tympanic opening. 
