SIWALIK AND NARBADA CARNIVORA. 
63—240 
Undetermined Tooth. 
In figure' 4 of plate XXX. there is represented a canine tooth of a carnivore, 
obtained by Mr. W. T. Blanford from the Siwaliks of Pegu, British Burma. From 
its extreme straightness the specimen probably belongs to the lower jaw. The tooth 
is more cylindrical, and straigliter than the canine of any known species of Ursus : 
in the former respect it comes nearer to Hycenarctos , but is distinct from any of the 
canine Teeth described above. The specimen is insufficient even for generic 
determination. The antero-posterior diameter at the base of the crown is 084, and 
the transverse 082 : the summit has been broken off, and the enamel chipped away 
in many places. 
Group B : GANINJE. 
Genera classed in the group : — In the account of the family Ursidce , in which the 
present group is included, it has been mentioned that no satisfactory distinction can 
be drawn between tire fossil representatives of the bear-like and the dog-like animals ; 
the genus Dinocyon, which is arbitrarily included in the former group, having fully 
as much affinity with the latter' : the present group must, therefore, be regarded as 
a purely arbitrary one, framed for the convenience of working. It is equally 
probable that in the opposite direction the group shades imperceptibly into the 
Viverndce, though the complete chain is not yet known. 
In regard to the existing wolves, jackals, foxes, etc., which may be collectively 
called dogs, forming the family Ganidce of recent zoology, Professor Huxley, in a 
recent memoir, 1 has shown that their dentition exhibits a remarkable progressive 
serial development, or specialization, in four directions; — viz., firstly, in the relatively 
increasing size of the whole dentition to that of the skull; secondly , in the pro- 
portionate increased size of the carnassial teeth to the hinder cheek-teeth ; thirdly, in 
the diminution in size, or disappearance, of the hinder true molars ; and, fourthly , in 
the structure of the carnassials. In respect of the two first points 2 the following 
table, taken from the memoir cited, exhibits the proportionate length of the carnassial 
teeth to the basicranial axis (=100), and to the succeeding cheek-teeth in six species 
Janis, viz. : — 
A. 
B. 
C. zerda. 
C. littoralis. 
C. famelicus. 
C. vulpes. 
C. niloticus. C. argentatus. 
Length of pm- 4 
20-6 
22-4 
23-5 
27-3 
28-3 
28-5 
„ „ m^l . 
17-3 
18U 
18- 
19-4 
19-4 
20-5 
„ „ mTT . 
24- 
. 27-2 
28- 
30-5 
31-1 
34-4 
>> ,, m -2 . 
14- 
15-7 
13-5 
14-7 
14-4 
15. 
1 ‘ Pro. Zool. Soc.,’ 1880, pp. 238-88. 
2 It is unnecessary for the purpose of the present memoir to give Professor Huxley’s cranial characters of the alopecoid 
and thooid dogs, as these are very generally inapplicable to palaeontological purposes : for this reason both are included in the 
genus Car/is, and are not separated as Vulpis and Canis. 
