122 Mr. R. I. Pocock on the 



for instance, one had three bristles to each tuft, the other 

 only one — a difference I suspect to be due to moulting. 

 On the other hand, in species with long hair or cojjioua 

 whiskers on the cheek, like Panthera tigris and Felis lynx^ 

 these vibrissse are not always easy to find. In an example 

 of the Tibetan lynx, F. lynx isabellina, for instance, each of 

 the genal tufts was represented by a single bristle mixed up 

 with the fringe on the cheek. Similarly, in examples of 

 F. sylvestris and of F. ocreata, recently examined, each 

 the genal tufts was represented by a single bristle. 



The Feet. 



In the 'Annals and Magazine of Natural History^ (8) 

 XAdii. pp. 419-429 (1916), in a paper dealing with the 

 external characters of the hunting leopard or cheetah 

 {Acinonyx jubatus), I described the feet of that Feline, and 

 compared them with those of the common leopard (Panthera 

 pardus) to show the differences betAveen them and to illus- 

 trate the range of structural variation in the feet within 

 the limits of the family Felidse. I stated that the feet 

 of Acinonyx are distinguished from those of all the other 

 members of that family by the complete absence of cuta- 

 neous sheaths for guarding the claws; but added that the 

 feet of the typical Felidse by no means always conform to 

 the Pantherine type in the degree of development of these 

 sheaths. In the following pages I have described and 

 figured the feet * of several species from the Old World 

 and the New to show how they differ from each other. 

 Since the selection is tolerably wide, it does not appear to 

 me probable that any species of cat exists with feet differing 

 in any important respect from all of those here discussed ; 

 but a few interesting species, like F. manul^ pajeros, and 

 planiceps, still remain to be done. 



Since in their main characters the feet here described 

 agree with those of Panthera pardus^ it is needless to repeat 

 what was said on that head in the paper above quoted f. 



* The drawings have been taken from nieasiu'ed feet with the hairs 

 surrounding the pads cut short, and the feet are represented as naked 

 with the digits spread, the axes of digits 2 and 5 being approximately at 

 right angles. 



t Apart from the forms assigned to Panthera, a genus which I have 

 elsewhere defined, all the species are provisionally referred to the genus 

 Felis, 



