238 ERNEST WAEREN. 



It will thus be seen that all the measurements, with the 

 exception of those of the horns and hoofs, are considerably 

 smaller in the black duiker than in a normal specimen. The 

 measurements of the normal ram were made on a mounted 

 specimen; but as they are in substantial agreement with those 

 given by W. L. Sclatcr for the common duiker (' Mammals 

 of South Africa/ vol. i, p. 159) they may probably be regarded 

 as roughly accurate. 



The abnormal ram appears to be proportionally shorter .in 

 the head and neck than in the body-length, since the diiference 

 in body-measurement in the abnormal and normal rams is only 

 three inches, while the difference in the total length is over 

 six inches. Omitting the length of the horns and hoofs, and 

 comparing the remaining measurements, the abnormal duiker 

 may be said to be about four-fifths the size of a typical ram. 



In addition to the dwarf condition we find abnormality 

 in the skin, hair, hoofs and horns. 



The skin was deeply pigmented throughout, and was of a 

 nearly uniform black, both ventrally and dorsally. In no 

 sense was the skin diseased ; it appeared, in fact, to be per- 

 fectly healthy. 



At no time of life was the skin provided v/ith the ordinary 

 coating of hair. A few scattered hairs occur on the sides of 

 the body and on the legs, with a distribution of two or three 

 to the square inch ; while along the back and on the face, 

 forehead, outside of the thighs, and tail the hair is rather more 

 plentiful. The coloration of the hair is perfectly normal ; 

 thus, in those places where in the ordinary animal the 

 hair is black, such as between the horns and on the iniddle 

 line of the tail, there the few scattered hairs are also black. 

 On the sides of the body and head the hairs are typical in 

 having the terminal third white, followed by a black or brown 

 band. On the ventral surface the few hairs that do occur aro 

 white as in the normal animal. The hairs are of normal 

 length. 



The hoofs also exhibit abnormality. Those of the hind 

 limb are as large as those of a full-sized duiker, while those 



