SIWALIK AND NARBADA CARNIVORA. 
169—346 
The Clacton bone is intermediate in size between the humerus of an average existing 
lion and that of the largest cave-lion ; thus indicating the relative size of the animal 
to which the Siwalik bone belonged. The supinator ridge ( s . r .) is rather more 
strongly marked in the latter, and the internal condyle (i. c .) is longer, but 
there is no other very prominent mark of distinction between the Siwalik and 
Clacton bones. The supra-condylar foramen (c. /.) is considerably smaller than in 
the tiger; but its anterior aperture is relatively large, as in the lion and jaguar. 
The form of this bone indicates that it belonged to a species distinct both from 
the fossil and recent lions, and the tiger ; while its large size shows that the only 
known Siwalik felines to which it could have belonged are Felts cristata or 
Mciehcerodus palceindicus. Since in the humerus of M. necator, to which the latter 
species is allied, there is no supra-condylar foramen, 1 it is not improbable that the 
same condition may have obtained in the Indian species, and there is accordingly 
more likelihood that the bone under consideration belonged to F. cristata : this is 
confirmed by its general similarity to the humerus of the lion, and by the fact that 
in M. meg anther eoF although the supra-condylar foramen is present, the lateral 
expansion of the internal condyle of the humerus is very slight. 
Ulna. — In figure 1 of plate XLV. there is represented, from the external 
(preaxial) aspect, the proximal extremity of the right ulna of a large feline from the 
Narbada beds. 3 This specimen agrees in proportionate size with the humerus 
described above ; and although of larger size than in an existing lion, agrees 
very closely with the ulna of that animal ; especially in the inward inclination and 
pyriform shape of the olecranal tuberosity | left side of top of figure ), in the 
narrowness of the groove separating the two small tuberosities on the superior 
surface, and in the form and proportion of the two sigmoid cavities. In the tiger 
the olecranal tuberosity is more elongated and less prominent, the small tuberosities 
on the superior surface are less developed and more widely separated, and there is a 
prominent ridge on the posterior surface, which is wanting in the present specimen 
and the ulna of the lion. The species of cats that existed in the Narbada period 
are at present unknown, but it is highly probable that Maclicerodus had disappeared. 
The present bone may .quite possibly have belonged either to F. cristata or F. leo , if 
either existed in the Narbada period. 
In the Indian Museum there is the proximal extremity of the right ulna of a 
somewhat smaller feline (No. D. 74), from the Siwaliks of the Punjab: this 
specimen, though too damaged for figuring, has a relatively shorter olecranal 
process, and probably belongs to a distinct species from the last specimen. 
Femur. — In figure 2 of plate XLV. there is represented the distal half of the 
1 ‘ Amer. Nat.,’ vol. XIV., p. 854, fig. 15 (‘ epitrochlear canal’). 
2 Blainville, “ Osteographie,” Genus Felis, pi. XVIII. 
3 This specimen was in the old collection of the Geological Survey of India, previous to its removal to the Indian 
Museum, among other Narbada specimens. From its mineralogical condition the present writer was formerly disinclined to 
admit its Narbada origin (‘ Journ. As. Soc. Beng ,’ vol. XLIX., pt. 11, p. 27) ; but as other specimens exhibit a precisely 
similar condition this may be admitted. 
p 2 
