403 
transversely, but in every direction ; and their base is without any 
collar-like projection. These remarks are chiefly applicable to the 
three last grinders : the others are different in every respect. 
The last of these, that which precedes the antepenultimate, has three 
slight convexities on its external face, and three points on its crown, 
which render the coronal line undulating. From this line, near its 
middle, a branch is given, which passes towards the internal face, and 
there bifurcates. The next two have also three convexities and three 
points, but their crowns have not the branching line ; or if a little of 
it exists in the second of these teeth, it does not bifurcate. Before 
these stands the one which answers to the first of the 'palceotherium. 
It is equally simple with that, and is compressed, and generally pointed. 
In this part, in the palceotherium, commences the vacant space, at the 
end of which is placed the canine tooth. Neither of these existed in 
this animal ; but, immediately before the small molar tooth last de- 
scribed there are three incisors, nearly similar to the preceding tooth, 
but which become more and more pointed. Hence there appears to 
have been, in the lower jaw of this animal, fourteen grinding and six 
incisive teeth, without any canine tooth or intervening space. 
For the purpose of showing the difference of form between the two 
kinds of grinders in this animal, one of each is here figured Plate 
XXI. Fig. 8, being the antepenultimate ; and Fig. 9, the one before 
the antepenultimate ; or, in other words, Fig. 8 is the first of the last 
three grinders ; and Fig. 9, being the next to it, is the last of the 
other series. 
The propriety of necessity, indeed, of regarding this animal, as 
distinct from any known genus, will appear from these considerations. 
Among the pachydermata, the rhinoceros and daman alone are without 
canine teeth ; but they have but four inferior incisors, or they even 
want them entirely ; and when they do possess them, there always is 
an interval between the last incisive and the first grinder. 
Nothing similar can be expected to be found out of the class of 
