4.06 HIPPOPOTAMUS. 
of the conjecture of Douglas, that such animals, though 
now tropical, were formerly inhabitants of these regions. 
Additional arguments, as novel as ingenious, m support 
of the same conclusion have been deduced by Dr. Buck- 
land from his examination of the cave at Kirkdale and of 
the remains of the quadrupeds, including the Hippopo- 
tamus, which he discovered in that remarkable depository 
of organized fossils. Of the great amphibious Pachyderm 
he cites six molar teeth and a few fragments of canine and 
incisor teeth, ‘the best of which are in the possession of 
Mri/Chorpe, ot) York.”** Bigy a0, in plate vii., repre- 
sents a much-worn last deciduous molar of the upper jaw 
of a young Hippopotamus, and figs. 8 and 9 two perma- 
nent molars which had just cut the gum, and had not had 
their fangs completed when the animal perished: the tooth 
in pl. xii. fig. 7, is the last deciduous molar of the lower 
jaw. These teeth of the Hippopotamus, therefore, like 
the teeth of the Mammoth+ associated with them in the 
Kirkdale Cave, prove that they were young and inex- 
perienced individuals that had fallen into the clutches of 
the co-existing predatory Carnivora which made that cave 
their lurking-place, and perfectly coincide with the con- 
clusions which Dr. Buckland thus enunciates : — “‘ The 
facts developed in this charnel-house of the antediluvian 
forests of Yorkshire demonstrate that there was a long 
succession of years in which the Elephant, Rhinoceros, 
and Hippopotamus had been the prey of the Hyznas, 
which, like themselves, inhabited England in the period 
immediately preceding the formation of the diluvial gravel ; 
and if they inhabited this country, it follows as a corollary 
that they also inhabited all those other regions of the 
northern hemispheres in which similar bones have been 
* © Reliquiz Diluviane,’ p. 18. + Ante p. 259, 334. 
