154 EINAE LONNBERG, MAMMALS COLLECTED BY THE SWEDISH ZOOLOGICAL EXPEDITION ETC. 



forests around Nairobi, and even so far north as in the forests at Meru boma. In 

 the forests of Kenia I saw heaps of its droppings a little everywhere and found the 

 remains of its skull at a Wandorobbo fire-place at an altitude of about 2,700 m.' 



I have compared skins and skulls of the 6 specimens which my license per- 

 mitted me to shoot with von Duben's type specimens, kept in this museum, and 

 also with some specimens from Kilimanjaro. With regard to the colour there is a 

 certain variation, some specimens being more reddish others more dark, chestnut 

 brown. The darkest specimen in my collection is a female shot at Meru boma. It 

 agrees in colour best with a male from Kilimanjaro. 



With regard to the skulls there is a considerable variation in the degree of 

 development of the nasal process of the premaxillary. In von Duben's type this 

 process is short and pointed, and separated from the anterior end of the lacrymale 

 by an interspace of about 7 mm. along which the maxillary and the nasal form a 

 suture with each other. In all specimens of my collection the nasal process of the 

 premaxillary is more strongly developed and extends rather broadly backwards so 

 that it meets the upper anterior end of the lacrymale and fully separates the maxil- 

 lary and the nasal from each other. I believed at first that this should be a racial 

 characteristic, but when examining the Kilimanjaro specimens I found them to be 

 intermediate. They have the interspace between the tip of the nasal process of the 

 premaxillary and the anterior end of the lacrymale shorter than in the type, and 

 the suture between the maxillary and the nasal accordingly much shortened. In 

 one of the Kilimanjaro specimens this distance is almost completely reduced. In 

 consequence of this intermediate stage all specimens are retained under the original 

 name. 



The size, shape and situation of the premaxillo-maxillary vacuities are subjected 

 to a great variation in my material. They are sometimes large sometimes small, in 

 some specimens only the upper posterior end is left, and in one of the bucks it is 

 practically obliterated as only a small opening entirely situated in the maxillary 

 is left. 



The female type is an old specimen, and this is probably the reason why it is 

 broader than my female skulls, because my best buck has a broader skull than the 

 other male skulls. The differences with regard to these dimensions are therefore not 

 of racial value. 



The »Suni» was chiefly found in forests with a rich undergrowth of bushes 

 and it was often very dark in its haunts. The first specimen was shot in a thicket, 

 where my gunbearer had detected it, but it was so dark that I only could see the 

 flickering movements of its light tail, and had to aim at that without knowing whether 

 the body was to the right or left of the visible object. The Suni appears to know 

 that it is well protected in this kind of thickets and does not move far when it has 

 been disturbed. It has the same habit as some other antelopes to deliver its ex- 

 crements in a certain place and, in spite of the small size of the animal, large heaps 

 of its droppings are often found in the woods. 



^ I saw also a specimen on the Mombasa island. 



