SIWALIK AND NARBADA CARNIVORA. 
109—286 
the means given by Professor Busk in the memoir already quoted. 
H. felina. 
H. 
crocuta. 
H. brunnea. 
H. striata. 
— 
^ 
t 
* s 
Brit. Mus. 
Dublin 
Ind. Mus. 
16,565 
skull 
D, 102 
Fossil 
Recent 
Length of last three cheek-teeth 
2-75 (?) ' 
2-35 
,, , 
, series of ,, 
3-18 
3-7 
3-52 
3-4 
3-09 
2-68 
„ , 
, pm. 2 
0-65 
0-78 
0-66 
0-63 
0-62 
0-52 
Width , 
0-54 
0-48 
0-44 
0-45 
0-32 
Length , , 
3 
0-85 
1-03 
0-89 
0-85 
0-84 
0-72 
Width ,, 
, ,, 
0-55 
0-65 
0-65 
0-6 
0-55 
0-5 
Length , 
, 4 .. 
0-85 ■ 
0-92 
1-1 
0-95 
0-91 
0-94 
0-78 
Width , 
0-55 
0-76 
0-59 
0-52 
0*53 
0-48 
Length , 
, m. 1 
1-0 
1-05 
1-22 
1-2 
1-2 
0-94 
0-81 
Width , 
, ,, 
0-5 
0-67 
0-55 
0-5 
0-5 
0-4 
Depth ,. 
, jaw at m. 1 
1-73 
1-75 
1-86 
2-2 
1-64 
1-63 
1-39 
Interval between canine and pm. 2 
0-4 
0-4 
0-37 
0-41 
0-45 
These dimensions indicate tha.t the mandible in the Indian Museum belonged 
to an animal larger than the pleistocene race of H. crocuta ; while the British 
Museum specimen indicates ' an animal of about the mean size of the living 
race of that species. The premolars of the fossil are larger in proportion to m. 1 
than in H. crocuta. 
Regarding the affinities indicated by the lower cheek-teeth of this Siwalik 
hyaena it has been shown that m. 1 is essentially crocutine, and, therefore, perfectly 
distinct from the corresponding tooth of H. striata and II. brunnea. The premolars 
have a considerable general resemblance to those of II. crocuta , but are distinguished 
by their relatively lower crowns, and the more marked ridges at their fore-and-aft 
borders, this character being most noticeable in the anterior ridges ; they are also, 
as mentioned, larger in proportion to m. 1 ; while the hind talon of pm. 3 and the 
anterior talon of pm. 4 are relatively larger ; and pm. 2 is altogether relatively longer. 
Other specimens. — In figures 5, 5a, of plate M. of the “ F.A.S.,” there is 
represented part of the left ramus of the mandible of a Siwalik hyaena in the British 
Museum (No. 39,731), apparently agreeing in all essential characters with the specimens 
described above 1 : it shows the base of the canine, the second and third premolars, 
the base of the. fourth tooth of the same series, and nb 1 . The latter is of the 
crocutine type, and the premolars appear to agree with those of the jaws described 
above ; the squared form of pm. 3 is well shown in this specimen. 
In figure 3 of plate XXXIX. of the present volume there is represented the 
dental aspect of a fragmentary mandible of a Siwalik hyaena, formerly in the 
collection of the Asiatic Society of Bengal, and now in the Indian Museum (No. D. 
50). In the catalogue of the society’s fossil collection by Drs. Falconer and Walker 2 
it bears the number S. 849, and is described as “ a fragment of lower jaw, right side, 
containing the four molars in situ : teeth larger than in the existing [? Indian] Hyaena, 
but a good deal concealed by matrix.” The teeth have now been cleared of matrix, 
1 This specimen, together with the one (B. M. No. 37,140), represented in figures 7. 7a, of the same plate, is referred 
hy Mr. Bose (‘ Quart. Journ. Geol. Soc.,’ op. cit., p. 128), to his Bycena sivalensis : it will, however, he shown in the sequel 
that the mandible of that species is of quite a distinct type. 
2 p. 189 ; see also “Palaeontological Memoirs,’’ vol. I., p. 343. 
A 2 
