THE HIPPOPOTAMUS 299 



The color of the skin is grayish-oHve and is deepest on 

 the back and hghtest on the under-parts, where it is in hfe 

 a pinkish-drab on the belly, axillae, and groins. The hair 

 covering is absent except on the tip of the tail, the inside of 

 the ears, and on the muzzle. The tail is furnished by a 

 conspicuous tuft of seal-brown hair, four or five inches long, 

 attached like a mane to the ridge of the flattened tip. The 

 ears are heavily haired on the inside by olive-brown hair 

 three-fourths of an inch in length, and the great lips at the 

 muzzle, as far back as the nostrils, support a scattered 

 growth of stiff buffy-brown tufts of hair placed at regular 

 intervals apart, like the bristles of a scrub-brush. 



The male skin from Naivasha differs from the three 

 female skins, apart from its larger body size, by the much 

 stiffer or bristle-like character of the tail tuft, which is also 

 somewhat more extensive and lighter in color, being buffy- 

 brown. The three females show much variation in the 

 amount of tuft on the tail. In the Athi River specimen 

 the terminal tuft is quite wanting, only a few short hairs 

 one-half inch long being present. The lack of a definite 

 tail tuft is no doubt due to the youth of the specimen, 

 which is quite immature and has its milk teeth still in use. 

 A living specimen from German East Africa, in the Washing- 

 ton Zoological Gardens, of about the same age is also with- 

 out a definite tail tuft. The other two skins from Nai- 

 vasha, which are fully adult, have the tail tuft composed of 

 fairly soft chocolate-brown hair, the longest hairs having a 

 length of 4^ inches. 



The flesh measurements of the large male from Lake 

 Naivasha, which has been made the type specimen of the 

 race, were: head and body, 12 feet 2 inches; girth behind 

 shoulders, 12 feet; tail, 20 inches; hind foot, 2i>^ inches; 

 ear, 33^ inches. The skull of this specimen measures 28^ 

 inches. The largest adult female from the same locality 

 measured in the flesh considerably less: head and body, 11 

 feet 2 inches; girth of body, 11 feet; tail, 15 inches; hind 

 foot, 21 inches; ear, 3 inches. Length of skull, 25^ inches. 

 The record circumference for lower canine teeth for British 

 East Africa recorded by Ward is yyl inches, but this di- 

 mension is doubtless an inch or two below the real record 

 for the region. The type bull from Naivasha, which is of 



