MOLAR TEETH AND OTHER REMAINS OE MAMMALIA. 
17 
pletely across the valley ; the comhing-plate {the second 'projection, on the same side 
as the last) is shorter than in the last specimen ; it is opposed by the large ante- 
crochet {the projection from the opposite side to the two former ones) from the anterior 
collis; the difference in the relative position of these processes of the median 
valley from those of the last specimen is caused by the different relations of the 
boundary walls of the two teeth. Were the crown of this specimen worn down 
it would present three fossettes in the median valley, one on either side of the 
crochet, and a third, formed at the outer extremity of the valley, by the combing- 
plate and the antecrochet. The posterior valley, as in all ultimate molars, is not 
present, and the median collis becomes confluent with the external wall of the 
tooth : the antero-external angle is sharp and pointed ; there is a single vertical 
costa on the dorsum, situated at a distance of 4 inches from the antero-external 
angle. The measurements of this specimen are as follows : — 
Anterior side 
External side 
Posterior side 
Height of crown 
In. 
2-1 
2-5 
2-0 
2-8 
A figure of an ultimate upper molar of the right side of Bhinoceros platy- 
rhinus is given in the “ Eauna Antiqua Sivalensis” ; in this it will be seen that there 
is no antecrochet, as in the present specimen, and the crochet is of much smaller 
size, not extending right across the valley, while the anterior valley is scarcely 
distinct from the cingulum ; the dimensions given below are also much larger than 
those of the present specimen ; tending to confine the distinctness of the two forms. 
The measurements of the ultimate molar of B. platyrhimis given by Dr. Eal- 
coner are as follows in inches : — 
Length (external side) ... ... ... ... 3‘2 
Breadth (anterior side) ... ... ... ... 2’8 
Height of crown ... ... ... ... 3*1 
The Nerbudda species of Bhinoceros must, therefore, have been considerably 
smaller than B. platyrhinus, which, apart from other characters, would probably be 
sufficient to establish its distinctness. 
The last upper molar of this species is distinguished from the last molars of B, 
sumatrensis and B. javanicus by the presence of a combing-plate and an ante- 
crochet, and by the greater size of the crochet, and by the presence of three fossettes 
instead of two on the worn crown-surface. 
The last molar of B, indicus has a combing-plate, an antecrochet, and a large 
crochet ; the combing-plate and antecrochet do not, however, unite, so as to divide 
the median valley in B. indicus as they do in the present species i moreover, the 
crochet of the former species is recurved at its extremity, and passes up the median 
valley between the combing-plate and the antecrochet. The crown of the present 
( 35 ) 
