KUNGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 48. N:0 5. 31 



In the following systematic part the mammals collected by this expedition are 

 enumerated with some notes about their occurrence and on their habits as far as any 

 observations in this respect could be made. Too much work prevented me, however, 

 from making a more thorough study of the biology which otherwise would have been 

 of great interest to me, but I could not sacrifice much time on such problems. 



In some cases I think that most probably the mammal quoted is only of sub- 

 specific rank, but when I have not had the opportunity of forming myself an opinion 

 about its relation to other forms I have used only binomials, although trinomials 

 perhaps will prove better when more material has been studied. The law of priority 

 has been followed except in one case, which will be mentioned below, because the 

 confusion resulting from an alteration of this old well known name would be too great.* 



With regard to the correct determination of some specimens I have had the 

 pleasure of consulting colleagues at other museums which is gratefully acknowledged 

 here and especially mentioned in each case below. 



Primates. 



CercopitliecidaB. 



Colobus abyssinicus kikuyuensis n. subsp. 



In the forests near Escarpment station I had the opportunity of collecting the 

 six specimens of Guerezas to which I was entitled by my license. I had believed 

 that the true Colobus caudatus should be met with at the locality mentioned, because 

 that species has been recorded from Kenia, thus not very far from Escarpment. 

 When I had shot the first pair, however, they appeared to me rather small and 

 their tail-tufts were only little developed, whereas the black at the root of the tail 

 had a broader extension than in the true G. caudatus from Kilimanjaro. The same 

 observation was made on the following specimens obtained, and when I finally found 

 that a small young was not white as that of the Kilimanjaro Guereza, it appeared evident 

 that the Escarpment forests were the home of a separate race of Guerezas. This 

 was also born out by a closer examination of the material at home, when the relative 

 characteristics of the fur were supported by cranial measurements. 



The new subspecies may be characterized in the following way: A Guereza 

 closely related to C. abyssinicus caudatus Thomas but smaller with the white tuft of 

 the tail shorter and less developed, measuring to the tips of the hair 44 em. in a 

 rather old male, about 33 cm. in a young adult male and about 39 in the best 

 female. The black of the upper side of the tail which terminally is more or less 

 mixed with white extends in these three specimens resp. 27, 24, and 24 cm. from 

 the root of the tail. The greatest length of single hairs in the tuft of the old male 

 is about 18 — 19 cm. and much shorter in the other specimens. The hair of the 



1 I omit to change this name, for the present at least, because many prominent zoologists are agreed 

 about the desirability of fixing certain old wellknown names to avoid confusion in spite of the priority law. 



