540 



MR, K. I. POCOCK ON TOE EXTURNAL 



front, but blending behind with the integument of the ear. It 

 suggestively resembles the supratragus (plica principalis) of the 

 ear of typical mammals, the retention of which in the Suidse 

 would be of interest, but Boas does not identify it with that 

 ridge. The part below the groove descends into the tubular 

 25art of the ear, and is pierced inferiorly by the auditory orifice. 

 Its upper edge, just beneath the supratragal ridge, is raised 

 posteriorly into a rounded excrescence. (Text-fig. 36, C.) 



The ears vary in size and shape according to the genera. In Sus 

 scrofa and Potamochcerus porous the posterior edge is lightly con- 

 cave above and widely rounded below, the apex being more elon- 

 gated in the latter than in the former genus. In Phacochcerus the 

 posterior border is not widely rounded inferiorly, but is emarginato, 

 and above the emargination there is an angular lappet. 



The Feet. 



The feet of the Suidse differ from those of the Hippopotamidje 

 in that progression is bidigital, the weight oi the body resting 



Text-fio^ure 37. 



A. Lower view of foot of Stis scrofa. 



B. Section of foot of the same. 



upon the hoofs of the second and third digits, those of the first 

 and fourth at most touching the ground with their tips. There 

 is no median plantar pad, but the third and fourth digits are 



