300 TAPIROIDA. 
Tapir of Cuvier, for example, have as yet been found in 
the older pliocene crag of England; although the asso- 
ciation of this gigantic Pachyderm with the Mastodon 
angustidens, in the contemporary formations of Eppels- 
heim and France, has been attested by numerous and 
well preserved fossils, including the entire cranium. 
The molar teeth of the Dinothere had their grinding 
surface crossed by high and sharp transverse ridges, like 
those of the Mastodon giganteus; but, in most of the 
teeth, the ridges were restricted to the same number, two, © 
which characterizes the molars of the Tapir. The tusks 
of the lower jaw, which are early lost in one sex of the 
Mastodons, were retained in both sexes of the Dinothere 
with a greater and indeed peculiar degree of downward 
curvature, yet still manifesting the analogy to the Mas- 
todons by their superior size in the male Dinothere. 
These points of resemblance would signify compara- 
tively little in the imquiry into the natural progression 
of the affinities of the Pachyderms, had the Dinothere 
been a gigantic Herbivorous Cetacean, as some have con- 
jectured; but, in addition to the arguments im favour of 
its true Pachydermal character derived by Dr. Kaup * 
from the texture of the cranial bones, their richly de- 
veloped air-cells, the deep implantation of the petro-tym- 
panic bone of the organ of hearing, and other parti- 
culars of minor import, I may adduce the texture of 
the dental substances of the molar teeth, and the ver- 
tical displacement and succession of the small deciduous 
anterior molars by true premolars, or “‘ dents de remplace- 
ment,” in support of the view here taken of the position 
of the genus Dinotherium in the Pachydermal series, as a 
link between Mastodon and Lophiodon. 
* Akten der Urwelt, 8vo, 1841, p. 52. 
