PLATE XII. 
Palceomastodon C?) headnelU, Andrews ; 
(1 b) posterior views : one-fourth nat. 
Eocene). 
al., alisplienoid. 
al.c, alisplienoid canal. 
ao.f., antorbital foramen. 
hitj)., basispheuoiil. 
e.a.m., external auditory meatus. 
cu., eustachian opening. 
exo., exoccipittJ. 
f.l.a., foramen lacerum anterius. 
/.?.)»., foramen lacerum medium. 
fJ. 2 >; foramen lacerum posterius. 
f.rn., foramen magnum. 
f.o., foramen ovale. 
for., foramina opening into air-sinuses. 
i.c.c., foramen for internal common carotid. 
Page 
skull, lateral, (1 a) palatal, and 
size. Fluvio-mariue beds (Upper 
[M. 8464.] 130 
ju., jugal. 
7n. l-d, molars. 
mx., maxilla. 
jw., parietal. 
2 ) 1 ., palatine. 
2 )m. 2-4, premolars. 
2)-2^; paroccipital process. 
2'>pf-, posterior palatine foramen. 
2 >t., pterygoid. 
2 )t>/., post-tympanic process. 
S.C., sagittal crest. 
soc., supraoccipital. 
sij., squamosal. 
st.m,, stylomastoid foramen. 
