158 GIGANTIC MAMMALS OF THE GENUS EOBASILEUS. 
confluent with the crescent giving a V-shaped surface on the pre- 
molars, or later a triangular one. 
The general form of the cranium is remarkable. The temporal 
fossz are latero-posterior, and there is a transverse supraoccipital 
crest. The zygomatic arches are posterior and the orbits not 
enclosed behind, nor with marked superciliary ridges. The muzzle 
is compressed and roof-shaped, and the frontal bones extend far 
in advance of the tusks, and even beyond the extremity of the 
long premaxillaries, overhanging them still more than in the 
rhinoceros. The margins of their extremities are flared upwards 
forming bony projections like shovels. These may have supported 
dermal horns as in the rhinoceros. These are composed exter- 
nally of the maxillary, and internally of the nasal bones. Add to 
these, horns with stout osseous cores, one above each orbit, with 
approximated *bases, and the curious physiognomy of the form 
becomes apparent 
The general kn is massive, the TA are wide and capacious 
and the limb bones exceedingly stout. The great trochanter is 
flat and thick ; the fibular condyle well developed, and the astrag- 
alus little convex. The tarsus and foot are Proboscidian in 
character, and the short thick phalanges indicate the massive foot 
of a land animal. 
There are three species of this genus known to the writer. The 
E. cornutus is known from many parts of the skeleton, including a 
nearly perfect cranium. This cranium measures over three feet in 
% length and is in very perfect condition. The tusk is projected 
about a foot from its projecting alveolus and is recurved and cov- 
ered on the distal half with smooth enamel. The horn-cores are 
a foot long, very stout, trihedral at base and with an enlargement 
n the inner side. The nasal projections viewed from above give 
the end of the muzzle a bilobed outline. The diameter of the 
pelvis measured between the crests of the ilia is nearly five feet. 
“The long diameter of the proximal end of the femur is about ten 
inches. A sacral vertebral centrum is five inches in transverse 
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