OF MASTODONS, WITH REMARKS, ETC. 
11 
In the cabinet of the Society there is another fragment of a lower 
jaw, hut of the left side, in all respects similar to the preceding, though 
much less perfect. The upper parts of both the condyloid and coro- 
noid processes are deficient, but the anterior edge of the latter is more 
perfect than in the preceding specimen, and rises nearly perpendicularly 
from the ramus, The chin in this specimen is entirely deficient, as is 
also the whole of the inner table of the ramus, so that the maxillary canal 
is laid entirely open. This bone must have belonged to an animal nearly 
of the same age as the preceding, or perhaps somewhat younger; the last 
molar, as is seen from the alveole, for the tooth is wanting, not having ad¬ 
vanced by upwards of an inch as far forward as that in the former jaw. 
Whether or not the specimen described by Dr Godman, and the jaws 
last noticed belong to the same species, cannot be determined positively 
without further specimens. The jaw next to be described, however, 
exhibits differences, which would justify the suspicion that it is spe¬ 
cifically different from either. 
This specimen is represented in Plate XXIX. It consists of a 
portion of the right ramus of the lower jaw, twenty-two inches and 
a half long. It contains a single tooth, the posterior molar. 
The exterior aspect of this jaw, at its angle, is entirely smooth, without 
any of the rugosities presented in the two preceding specimens. Be¬ 
tween the posterior molar and the coronoid process there is a large 
smooth excavation, x. The ramus of this jaw is much less cylin¬ 
drical than that of the species figured in Plate XXVIII., it is much 
flattened on its exterior aspect, and its base is almost straight. The 
posterior mental foramen is exceedingly large, upwards of one inch and 
a quarter in diameter. The posterior molar is seven inches and two- 
tenths long, and four inches and one-tenth wide; it has eight points and 
a broad heel consisting of a row of small mammilla, four of which on 
the inside are very distinct. This tooth differs in various particulars from 
the posterior molar belonging to the specimen figured in Plate XXVIII. 
It is one inch and a half longer, and seven-tenths of an inch wider, the 
denticules are higher, and the inner points much higher above the ex¬ 
terior ones. Thus in the former, the second denticule (Plate XXVIII. v) 
rises one inch and eight-tenths from its root, and the inner one two inches 
and two-tenths; whilst in the latter (Plate XXIX. v) the corresponding 
