PT.A'rE II. 
Pilge 
Arsinoitlierium zitfeli, Beadnell ; skull, ])alatal and (1 a) front views; the 
ends of the horns have been restored : one-third nat. size. Fluvio-marine 
beds (Upper Eocene). 
a.o.f., antorbital foramen. 
ci.p.f., anterior palatine foramen. 
ho., hasioccipital. 
hap., ba.sisplienoid. 
c., canine alveolus. 
f.a.m., external auditory meatus, 
t'.i'o., exoccijiital. 
f.h., frontal born. 
pi., articirlar surface for mandible. 
/'. incisors or their alveoli. 
ui. l-il, molars. 
UK'S., prenasal bar. 
m.p.f., maxillo-palatine foramen. 
[M. 8463.] 
mx., maxilla. 
na., nasals. 
nar., external nares. 
n.h., nasal horn. 
orh., orbit. 
2^gl., postglenoid process. 
pi., palatine. 
pm. 1-4, premolars or their alveoli. 
pmx., premaxilla. 
pp f; posterior palatine foramen. 
jit., pterygoid. 
jifp; post-tympanic process. 
