MOLAR TEETH AND OTHER REMAINS OE MAMMALIA. 
51 
and a second costa on tlie posterior border only : the third lobe has no dis- 
tinct costa. 
The first molar is similar to the first two lobes of the last tooth. The whole 
of the surface of the teeth is coated with a finely rugose enamel, something like 
that of Camelopardalis. The teeth are considerably larger than those of the 
Samhar, with which their measurements are compared below ; those of the Samlar 
being in the second column : — 
, In. In. 
Length of last molar ... ... ... ... 1'4 1*25 
Length of penultimate molar ... ... ... ... 1*0 0*9 ^ 
Width of ditto ... ... ... ... 0*7 0*6 
The teeth are distinguished from those of the Samhar and Barasingha by 
their outer surface being perfectly parallel to their long axis, instead of each barrel 
being set slightly obliquely to this ; they are further distinguished by the very 
small size of the accessory tubercles and by the roughness of the enamel. 
The parallelism of the outer surface to the long axis of the tooth is a character 
these teeth possess in common with Cervus elepTias of Europe,* from which they 
are distinguished by the bluntness of the inner surfaces of the barrels, the small 
accessory tubercles, and the prominent ridge at the antero-external angle. 
It is only in regard to size that these lower molars agree with the upper 
molars of C. triplidens ; the absence in the lower molars of the accessory column 
is a great point of difference, and they may eventually have to be referred to a 
fourth species of Siwalik Cervus. 
Cervus simplicidens, non. sp. nohis. Plate 8, fig. 3. 
This third species of Siwalik Cervus is founded upon another type of upper 
molars, of which two are given in the above figure. These teeth are the last two 
molars of the left side, and have but just been touched by wear. The general 
form of the teeth is very near to those of the living Rucervus duvaucelUi^ and 
very different from those of both the species described above. The crowns are 
tall and somewhat slender, the inner surfaces sloping away from the inner to the 
outer side. The outer surfaces of both barrels are set nearly parallel to the 
antero-posterior axis of the crown ; the antero-external angle of each barrel being 
the most prominent points on the outer border, but neither of them more promi- 
nent than the other. The innermost summits of the barrels are extended antero- 
posteriorly. 
The median valley on the inner side extends for a long distance between the 
barrels ; at the entrance to this valley there is a very small accessory tubercle, 
less than a quarter of an inch in height, and never forming a part of the worn- 
crown surface ; it is placed in the valley considerably further in than the bases 
of the barrels. 
( 69 ) 
