36 EINAR LONNBBRG, MAMMALS COLLECTED BY THE SWEDISH ZOOLOGICAL EXPEDITION ETC. 



specimens from Nairobi are even more reddish on the back than some of the speci- 

 mens from Escarpment, for instance. The under parts have about the same colour. 

 The white collar is just as well developed in good specimens from Nairobi as in 

 specimens of corresponding age and sex from Escarpment, and the difference in the 

 length of the fur is not so great as it will appear from Dollman's description. Good 

 females from Nairobi have the hair on the middle of the back averaging from 45 to 

 55 mm., and in females from Escarpment it is not much longer. In male specimens 

 the fur is somewhat longer in both localities. 



That much is admitted that there may be seen a certain difference in the 

 length and thickness of the fur between specimens of this species obtained at Nai- 

 robi (5300 feet above the sea level), and such from Escarpment (about 8,000 feet 

 above the sea), or from Kenia at high altitudes. But this difference is not of spe- 

 cific, subspecific or racial importance because all three localities belong practically 

 to the same group of forests, and there are all kinds of intermediate localities where 

 all degrees of intermediate development of the fur can be found in direct corre- 

 spondence to the climatic conditions at every different place. ^ It is even quite pro- 

 bable that such a little difference in density and length of the fur may change 

 individually. If for instance a specimen moved from the forests on the lower slopes 

 to a higher altitude with a cooler climate this same individual would without doubt 

 develop a thicker fur. This is only in accordance with the well known fact, that 

 an animal, for instance an antelope of some kind, transferred from Africa to some 

 zoological Garden in Europe will in the latter place develop a thicker fur. 



Specimens from the forests at Meru boma are similar to those from Nairobi 

 of corresponding sex and age. 



I have not seen any specimens in which the ear tufts have been banded as 

 shall be the case in the subspecies hindei described by Pocock from »Tutha in the 

 Kenia district, 8000 ft. altitude.*^ This altitude is about the same as that of the 

 Escarpment. 



From the »Kima» of Kilimanjaro which I have described' under the name 

 Cercopithecus albogularis kibonotensis this species is easily distinguished by several 

 characteristics. Above all the white of t}ie throat is much less extended in the Kili- 

 manjaro Monkey, in which it does not reach so far down on the neck, and stiU less 

 up on the sides of the neck. Its hindlegs are much blacker than in C. kolbi in which 

 latter they are speckled so that their general colour appears to be dark grey. The 



^ In this case the different climatic conditions and their results on the animals stand in connection with 

 differences in vertical distribution. But quite analogous things can be found in certain countries for instance 

 our own, as results of different horizontal distribution. Take a Squirrel or a Fox caught in January in Scania, 

 and compare it with a corresponding specimen caught in Upland at the same time of the year, and the diffe- 

 rence in fur will be greater even than between the Nairobi and Kenia monkeys, but nobody regards them as 

 belonging to different races as all intermediate conditions are to be found. If the comparison is extended to 

 animals from Lapland the result will be still more striking. 



* Proc. Zool. Soc. 1897 p. 704. 



3 Mammals: in Wiss. Ergebn. Schw. Zool. Exp. Kilimandjaro Meru 1905—1906 von Y. SjOstedt. 

 Upsala 1908. 



