12 
MOLAR TEETH AND OTHER REMAINS OE MAMMALIA. 
external angle is produced backwards. A distinct cingulum runs along the whole of 
the anterior surface and that surface only. 
The anterior valley is very narrow, bounded by the straight anterior portion of 
the cingulum ; the posterior valley {on the left side of the figure) is very small and 
narrow ; the median collis in the specimen is worn down and united with the small 
posterior collis. 
Were the crown to be more worn down than in the figured specimen, the 
combing-plate and the crochet would unite and form a second fossette in the 
median valley, so that the crown would present three fossettes, two formed by the 
median valley and the third by the posterior valley. 
The dorsa of the molars can be best studied from Colonel Baker’s cranium : in the 
premolars there are two vertical ridges placed opposite the two large colies; in the first 
molar the hindmost of these ridges is much smaller than the other ; in the second 
molar it has nearly, and in the last molar quite disappeared. The outer border of 
the crown in all the teeth is nearly parallel to the long axis of the tooth, and wears 
quite flat. The colies in the premolars are more equal sized and the pass into the 
median valley is higher in the premolars than in the molars. The following are 
the dimensions of the molar series in Colonel Baker’s cranium :-~ 
Length of six molars 
Width of penultimate molar 
Width of first premolar 
In. 
13-0 
Do. 
of outer surface 
of last molar ... 
... 2-75 
Do, 
do. 
do. 
of penultimate molar 
... 2-70 
Do. 
do. 
do. 
of first do. 
... 2-40 
Do. 
do. 
do. 
of last premolar 
... 2-10 
Do. 
do. 
do. 
of penultimate do. 
... 2-05 
Do. 
do. 
do. 
of first do. 
... 1-75 
3-00 
2-22 
The dimensions of the figured upper molar of this species, as given by 
Dr. Ealconer, are as follows : — 
External side 
Internal side 
Anterior side 
Posterior side 
In. 
4-0 
2- 7 
3- 0 
2-5 
A smaller specimen, also figured in the “ Eauna Antiqua Sivalensis ” {'glate 72? 
fig. 6), has the following measurements : — 
External side 
•In. 
... 3-6 
Internal side 
... 2-2 
Anterior side 
... 2-9 
Posterior side 
... 3-0 
Height of crown . . . 
... 3-1 
( 30 ) 
