platp: XXV. 
Fig. Page 
1. Stereogcmjs cromeri, Andrews ; imperfect skull, from side ; nat. size. Qasr-el- 
Sagha beds (Middle Eocene). [R. 3189.] 295 
2. Ditto : skull, nalatal view : nat. size. Same horizon. 
3. Ditto : mandible, from above and (3 a) from 
nat. size. Same horizon. 
4. Thalassocltelys Jihyca, Andrews ; posterior 
two-thirds nat. size. Same horizon. 
(UKj., angular process of mandible. 
art.^ articular surface of mandible. 
hoc., basioccijjital. 
cor., coronoid process of mandible. 
ec.pt; ectopterygoid j)rocess of pterygoid. 
e. n., external nares. 
eji.o., epiotic. 
c.ro,, exoccipital. 
/ '., frontal. 
f.c.i., internal carcVid foramen. ; 
f. s., foramen sphenoidale. 
gioove leading to inner side of orbit. 
i.ii., internal nares. 
m.ij.. groove on side of mandible for mnscle- 
atlacbiiient. 
[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 
in.r., maxilla. 
O.O., opistbotie. 
or., orbit. 
pa., parietal. 
j)I., palatine. 
jiiii.v., premaxilla. 
po.f., postfrontal. 
2»'.f., prefrontal. 
jjt., pterygoid. 
(j., i[uadrate. 
sue., supraocci[)ital. 
sq., sc|uainosal. 
sijni., symphysis of mandible. 
1.0., tympanic opening. 
