50 
MOLAR TEETH AND OTHER REMAINS OE MAMMALIA. 
on its external surface, the anterior of which is the larger. A rugose enamel 
covers the whole of the teeth : the dimensions are as follows : — 
In. 
Length of two molars ... ... ... ... ... 1’8 
Length of second molar ... ... ... ... ... 0*8 
Width of ditto ... ... ... ... ... 0-95 
Height of ditto ... ... ... ... ... I’l 
Width of third molar ... ... ... ... ... I'O 
Height of ditto ... ... ... ... ... 1-25 
Other specimens in the Museum are slightly larger. 
The upper molars of the present species are distinguished from those of the 
preceding by the absence of the produced postero-external angle ; by the presence 
of the prominent costse and grooves ; by the outer surface of the lobes becoming 
narrower at the base instead of wider ; by the presence of the small cingulum on 
the anterior surface ; and by the presence of the groove on the accessory column. 
The tall accessory column distinguishes the teeth from those of the European 
Deer. 
Erom the Indian Musa and Rucervus, the present teeth are distinguished by 
the antero-posterior diameter being longer and the transverse diameter shorter : 
by the greater height of the crown ; by the larger size of the accessory column ; 
and by the larger size and curving of the median costae on the outer surfaces of 
the lobes. 
The lower molars figured in plate 8, fig* 5, may, I think, possibly belong 
to this species ; the specimen contains the two last molars of the right side : both 
of them are complete, and in an excellent state of preservation. 
The ultimate molar, as usual, is composed of three barrels, the last of which 
is of relatively large size, though still smaller than either of the anterior barrels ; 
the inner boundary of the crown runs parallel to the long axis of the tooth, so 
that in the barrels the median costa becomes the most prominent point along the 
whole inner border of the tooth. The external surfaces of the tooth are bluntly 
rounded off and rise almost vertically from the neck to the summit of the crown ; 
the median valley between the barrels extends far into the centre of the crown ; 
at the base of the entrance into the external valley there is a very small accessory 
tubercle. The central enamel-folds are completely insulated* by wear ; the folds 
are of large size, constructed in the middle and swelling out at either end. At 
the antero-external angle of the first barrel there is a loop formed in the enamel, 
and a consequent ridge and groove at this part of the external surface of the tooth ; 
the anterior boundary of the crown-surface runs at right angles to the long axis 
of the tooth. The third lobe is connected by a narrow isthmus with the second. 
On the inner surface the barrels are separated from each other by a deep 
vertical groove : the anterior barrel has a very prominent median costa, and a faintly 
marked costa on either side ; the second lobe has the prominent and tall median costa, 
( 68 ) 
