PLA'J'E X. 
Fig. Page 
1. Mceritherium lyonsi, Andrews; left ramus of mandible, witli the molars and 
prcmolars, upper and (1 a) outer views ; the posterior portion is restored 
in outline from other specimens : one-half nat. size. Qasr-el-Sa^ha beds 
(Middle Eocene). 
[Type specimen, C. 10000.] 
108 
2. Ditto ; right upper cheek-teeth, 
crown view ; one-half nat. size. Same 
horizon. 
[C. 10001.] 
IOC 
3, Ditto ; anterior portion of skull, 
side 
view ; one-half nat. size. Same 
horizon. 
[C. 10002.] 
99 
4. Ditto; posterior portion of the same skull, upper and (4 a) posterior views: 
one-half nat. size. Same horizon. 
[C. 10002.] 
99 
5. Ditto ; crown of last upper molar : 
one- 
half nat. size. Same horizon. 
[M. 8902.] 
108 
«.o./., antorbital foramen. 
na., nasals. 
(•., canine. 
nar., external nares. 
(■Olid., condyle of mandible. 
orb., orbit. 
cor., eoronoid process. 
parietal. 
c.d.m., external auditory meatus. 
pm. 2-4, premolars. 
e.co., exoccipital. 
pmx., premaxilla. 
i. 1-d, incisors or alveoli of incisors. 
poe., paroccipital process. 
HI. l-:3, molars. 
soc., supraoccipital. 
m.f., mental foramen. 

sq., squamosal. 
