08 
Reconh of the Geolui/icul Suroe^ of Indta. 
[VOL. XI. 
is often noticed as a ISeitMOjiitlwciJ.s, an intermediate species probably belonging 
to that genus; and a small species probably belonging to Macacus. There seems 
also to be evidence of another sjjecies known from a single upper canine, but this 
does not concern us at present. 
We may now return to Mr. Theobald’s specimens; the finst of these consists 
of a portion of the right maxilla, containing the three true molars and the 
alveoli of the two premolars; the two first molars are slightly touched by 
wear, while the last (“ wisdom tooth ”) is still in germ, being very late in its time 
of pi’otrusion. The crowns of the teeth are oblong in shape, and bear on their 
masticating surfaces four cones placed at the angles of this surface; at either end 
there is a slight transverse talon-ridge. The first molar is smaller than the 
second, and the third nearly equals the first, and is somewhat narrowed 
j)Osteriorly. 
The second specimen is an almost similar portion of the left maxilla of a 
somewhat older, though similarly sized, animal; it shows the anterior root of the 
zygomatic arch, the last true molar, and the alveoli and fangs of the last pre¬ 
molar and two first molars; each of these teeth was inserted by three fangs. 
The last tooth of this speeimen is exaetly like the same tooth of the previous 
specimen, and shews that both specimens belonged to the same species. The 
anterior i-oot of the zygoma is placed immediately above the interval between the 
alveoli of the first and second molars. In the following table the dimensions of 
the first of Mr. Theobald’s specimens are gdven in the first column (a), the 
corresponding dimen.sions of Macacus {Tunv.us) rhesus in the second column (b), 
and those of SemnoiAthec^is entellus in the third column (c) :— 
Length of three molars 
„ first molar 
Width of „ 
Length of second „ 
Width of „ „ 
Length of third „ 
Width of „ 
a. 
h. 
c. 
075 
0-86 
10 
026 
■ 0-29 
0-32 
0-22 
0-28 
0-30 
0-29 
0-31 
0-35 
0-28 
0-30 
0-36 
0-26 
0-29 
0-35 
0-23 
0-28 
0-35 
We have now to consider the question of the genus of the fossil specimens, 
which we shall find a by no means easy in’oblem, as the teeth of allied genera of 
Monkeys are so exce.ssively alike one another. Firstly, we may say that, from 
their squared crowns, the teeth in question do not belong to the genus Ilylobates, 
in which the molars have rounded angles ; secondly, that they do not belong to 
Cynocephalus, on account of their small size, and from the last molar being nai-- 
rowed posteriorly, whereas it is of equal width throughout in the latter genus ; 
thirdly, that they do not belong to the genus Mesopitheem ^ from the upjior 
miocene of Attica, since the penultimate upper molar of that genus has an ac¬ 
cessory tubercle on its external surface, which is wanting in Mr. Theobald’s speci¬ 
mens ; scad, fourthly, that they resemble the teeth of Cereopithecus, SernnopithecMS, 
and Macacus (including sub-genera) so closely that they must belong to one of 
these three genera. 
(.laadry: “ Animaux Fossiles de F-Vtlique,” pi. 1, figs, (j, 7. 
