PLATE III. 
]’ig. Page 
1. Arsilioitlicrinm zifteli, Beadnell ; three parts grown skull, left side and 
(1 a) anterior views: oue-sixtli nat. size. Fluvio-marine beds (Upper 
Eocene). specimen, C. 8130.] - 
2. Ditto ; younger skull, superior, (2 a) left lateral, and (2 b) anterior aspects : 
one-sixth nat. size. Eluvio-marine beds (Upper Eocene). [C. 7805.] 2 
cd.c., alispheiioid canal. 
it.o.f., antorbital i'oranien. 
<ini. 4, fourth milk-molar. 
external auditory meatus. 
exo., exoccipital. 
f.h., frontal horn. 
//•., frontal. 
,/"•> ji'gal. 
la., lachrymal. 
jii. 1-2, molars. 
ms.g., me.sethmoid groove. 
mx., maxilla. 
na., na.sal. 
nar., external nare.s. 
u.li., nasal horn. 
orb., orbit. 
pa., parietal. 
p<jl., postgleuoid })rocess. 
pi., palatine. 
pm. 1-3, premolars. 
pmx., premaxilla. 
p.p., paroccipital process. 
pt., pterygoid. 
jdij., post-tympanie process. 
so., supraoccipital. 
i'7., squamosal. 
It., optic foramen. 
