84 STRUCTURE AND AFFINITIES OF THE BRONTOTHERIDE. 
cipital process of the ERT is elongate, and its anterior face 
concave. The post-glenoid process is very large, much extended P 
transversely, and is longer than the paroccipital process. i 
‘The premaxillaries in this cranium are imperfect, and the in 
cisors wanting. The canines, also, are not entire, but- they were 
only of moderate size, and in close proximity to the first pr emolar.. — 
This tooth had two fangs, and resembled the other premolars. All _ 
of these have a strong inner basal ridge. The crowns are more — 
nearly square than in Titanotherium Proutii Leidy. The upper 
true molars are very large, the last especially so. It resembles the | 
corresponding tooth in T. Proutii, but the inner posterior angle of 
the crown is much more developed. : . 
The limbs in this species were shorter than those in the existing _ 
elephants, which, in form of body, it- doubtless resembled. Le 
huge divergent horns, and the absence of tusks, gave the head a 
very different appearance. ‘The wide narial opening, the rugosè 
extremities of the nasals, and the very large infra-orbital foramen, 
naturally suggest that there must have been an elongated, flexible — 
- nose, possibly ag extensive as in the tapir. That there was 
long proboscis, as in the elephant, is indicated with equal certainly 
by the length of the head and neck, which renders such an 0 
unnecessary. : 
This species bears some ee ee to Brontotherium trig mi 
ceras (Symborodon trigonoceras Cope), but differs widely in ‘size, 
having been nearly or quite twice as large in bulk. The ne 
also, are very differently placed; the nasals are more elongai e 
and not emarginate at their extremities; the premaxillarie 
not prohinent s the = are meaty expanded ; an 
! rbital process. a 
3 SAN 
