42 The Amblypoda. [January, 
jaw the crowns of the molars support two oblique cross-crests, 
which unite to form a V with the apex inwards. There is some- 
times an internal cusp or tubercle. The inferior molars consist 
essentially of an outer V and a heel; the true molars differ in 
having the heel a little larger and more recurved on its posterior 
border, but it does not rise into a transverse crest as in the 
Coryphodontide. Mr. Osborn shows that the inferior incisors in 
Loxolophodon are compressed and two-lobed. 
The known genera agree with the typical Proboscidia in the 
shape of the scapula with pos- 
terior expansion and apical 
acumination ; in the flat carpal 
bones; in the absence of pit 
for round ligament of the 
femur; in the flattened great 
trochanter, contracted con- 
dyles, and fissure-like intercon- 
dylar fossa of the same bone. 
Also in the short calcaneum or 
heel bone, which is wider than 
long, and rough on the inferior 
face ; in the five digits on both 
feet, and the wide peduncle and 
iliac plates of the pelvis and 
lack of angular production of 
the latter beyond the sacrum. 
In spite of these resem- 
blances, the Dinocerata are at 
one side of the line of descent 
of the mastodons and ele- 
phants (see Vol. XVIII, p. 1121, 
for phylogeny of the hoofed 
G. 25.—Uintatherium mirabile Marsh, Mammalia). This is indicated 
sens in aa Gan oh aes not only by the structure of 
eet. From Bridger beds of Wyoming. their feet, but by that of their 
i oA Sch itis tee eee Marsh, teeth, which, as I have shown, 
constitute a survival of the tri- 
tubercular type which had been left behind by all other cotempo- 
rary ungulates, and only survived in the flesh-eaters of the 
Bridger epoch. 
