EXTERNAL OHARACTEKS OF THE PIGMY HIPPOPOTAMUS. 531 



2d. The External Characters of the Pigmy Hippopotamus 

 {Chmropsis Uheriensis) and of the Suidse and Camelidre. 

 By ]|. 1. rococK, F.R.S., F.Z.S. 



[Received May 28, 1923 : Read June 12, 1923.] 



(Text-figures 30 to 46.) 



Contents. 



Page 

 The Muzzle and Ears of Choeropsis Uheriensis 532 



The Feet of Choeropsis Uheriensis 533 



The Tail and Penis of Choeropsis Uheriensis 535 



The Rhinai'ium of the Suidse 535 



The Facial Vibrissse 538 



TheEar 539 



The Feet 510 



The Muzzle in the Camelidse 542 



The Occipital Gland of Camehts 544 



The Feet and Metatarsal Gland of Lama 645 



The Feet of Camelus ". 547 



The Penis oi Lama and Camelus 548 



The fresh material upon which the observations contained in 

 tills paper are hased was examined in the Society's Prosectorium 

 immediately after the death of the specimens. In the case of 

 some of the Suidje, like Porcula and Hylochoerus, I have been 

 compelled to rely upon dried skins in the British Museum. 



The only rare species examined was the Pigmy Hippopotamus, 

 of which a single old male example, presented by the Duke of 

 Bedford on December 16, 1913, died February 11, 1919. 



Section SUINA. 



Family Hippopotamid^. 



0h(EE0PSIS hberiensis. 



Owing to its smaller head, much shorter body, and relatively 

 longer legs, the Pigmy Hippopotamus differs markedly in 

 external appearance from its larger ally. It was generically 



Proc. Zool. See— 1923, No. XXXY. 35 



