MACH AIRODUS. 175 
the teeth of the extinct Argenton Crocodile, or of the more 
ancient reptiles called Megalosaurus and Cladyodon, than 
the canine teeth of any known existing carnivorous Mam- 
mal. 
These fossil falciform teeth have been found in the newer 
tertiary deposits in Italy, in Germany, in France, and in 
this country, for the most part singly and detached, and 
always very rare. They were first noticed in 1824* by 
Cuvier, to whom the specimens discovered in the Val 
D’Arno were exhibited by Professor Nesti; and, from 
evidence relative to their association with the remains of 
a species of Ursus, Cuvier was induced to refer them to 
that genus, under the specific name of Ursus cultridens. 
The first description of these large falciform canines is 
due to Professor Nesti, according to M. de Blainville, who 
cites his ‘“ Lettera terza dei alcune ossa fossili non peranco 
descritte, al Sign. Prof. Paolo Savi, Pisa, 1826.” Cuvier 
makes mention of one of these teeth in the Cabinet of 
Fossils at Darmstadt, which, from a drawing transmitted 
to him by M. Schleyermacher, seemed to resemble in every 
respect the falciform teeth found in Tuscany. 
Amongst the rich collection of fossils discovered, princi- 
pally by the Rev. Mr. Mac Enery, in the bone-cave of 
Kent’s Hole near Torquay, Devon, two canines were recog- 
nized by Dr. Buckland as very similar to those of Italy 
and Germany, on which Cuyier’s species ‘‘ Ursus cultridens” 
had been founded. 
M. Bravard, however, having observed in parts of a 
fossil cranium of a large species of Fe/is, indications of an 
unusually long and compressed canine tooth, in the form of 
the socket of the upper canine, and the deep depression for 
the reception of its crown on the outside of the lower jaw, 
* Supplement to the “ Ossemens Fossiles,” 4to. 1824, vol. v. pt. ii. p. 517. 
