MOLAR TEETH AND OTHER REMAINS OE MAMMALIA. 45 
rising nearly vertically from base to summit. The central infoldings of enamel 
extend deeply into the orowo, so that it would not be until a late period that they 
would become complete islands; the anterior and posterior walls of the central 
enamel fold of the first barrel are curved round towards the anterior side of the 
tooth : the summits of the outer halves of the barrels are bent over towards tbe 
inner side. 
On the external surface {fig. 10) the tooth is divided into two unequal and 
unsymmetrical portions by a vertical groove ; tbe posterior lobe of this surface has a 
large median ridge curving slightly forwards, as it passes downwards to form the 
summit of this part of the tooth ; on either side of the lateral borders of this lobe 
there are other still more prominent cost^, the posterior one of which is of great 
breadth, reflected towards the central costa, and produced into a sharp angle beyond 
the side of the tooth ; neither of these cost® extend downwards to the free edge of 
the external surface. The anterior lobe {on the right side of the figure) lias one very 
prominent median costa, and a shorter and wider anterior costa which embraces 
the antero-external angle of the crown. The outer half of the hinder barrel slightly 
overlaps the fore barrel. 
Except in its much greater size {larger than that of any of the ^European species) 
the tooth closely resembles tbe corresponding molar of Eorcatherium elegans of 
Kaup ; the cost® on the outer surface are, however, more developed, and the cingu- 
lum more prominent in the Indian form. The dimensions of the two molars are 
given below ; those of the European species in the second column : — ■ 
In. 
la. 
Length 
... 0-75 
0-45 
Width at first barrel 
... 0-8 
0-55 
Height of crown 
... 0*6 
0-3 
The second tooth from this locality {fig. 11) is also an upper molar of the 
right side ; it is somewhat smaller in size than the last specimen, and is worn down 
nearly to the level of the cingulum. On the external border {top line of figure) tbe 
boundary of tbe anterior barrel runs parallel with tbe long axis of the tooth ; the 
outer surface of this barrel is marked by two cost®, one in tbe middle, and the 
other at the anterior angle. The external border of the binder barrel {left of figure) 
is set obliquely to tbe long axis of the tooth ; the outer surface of this barrel is 
marked by three cost®. 
Tbe cingulum occupies half the circumference of the tooth ; it is much shallower, 
and more closely applied to the surface of the barrels than in tbe first specimen ; 
along the whole of the inner surface of the anterior barrel the edge of the cingulum 
is raised into points and oasps, and there are two distinct tubercles at the entrance 
into the median valley. Both this and the preceding specimen are covered with a 
finely rugose enamel. 
( 63 ) 
