ARSINOITIIEEIUM. 
3 
front of this the nearly flat parietal region, passing anteriorly into the rounded common 
base of the great horns. The zygomatic arch does not project very strongly, and 
Skull of Arsinoitherium zitteli, seen from behind. 
hoc., basioccipital ; cond., condyles ; exo., exoccipital ; f.h., frontal born ; f.m., foramen magnum ; in.n., 
internal nares ; n.Ji., nasal born ; prominence of squamosal ; pterygoids ; g.c., lambdoidal crest ; 
sot’., supraoccipital. ^ nat. size. 
the widest part of the posterior portion of the skull is situated just above and behind 
the auditory opening. In a palatal view (PI. II. fig. I) the peculiar wedge-shaped 
