KUNGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 48. N:0 5. 29 
can be distinguished from their near allies living in the Congo forest and further 
West, they must be regarded as members of the same fauna, and it is therefore of 
great interest to have stated their occurrence as far as to the northeastern slopes of 
Kenia. Their ancestors have arrived in Africa from the northeast, but if they them- 
selves have developed and remained in their present habitat while the other members 
of the same invasion were pressed further westward, or if they secondarily have 
arrived there again from the West cannot be decided before the geological develop- 
ment and age of the former volcano Kenia has become definitely known. 
Not less than nine of these forest animals enumerated in this list have also 
been found in the Central Lake district of the Western forest region, and a tenth, 
Mungos sanguineus orestes, is said by its describer to be most nearly related to a 
subspecies M. s. proteus living on Ruwenzori. The two long-tailed forest rats, Epi- 
mys jacksoni and EK. dennie, have decidedly western affinities as they are most closely 
related to the West African £. alleni and to E. carillus from northern Angola thus 
both members of the fauna of the Western forest region. In a similar way Leggada 
triton is allied with the Western L. musculoides. 
The remainder of the lot is at least in their quality as subspecies East African 
8. str. Although this proves that the majority of these forest animals have become 
differentiated to subspecies, or even species in East Africa s. str., it does not follow 
that they all are exclusively of East African origin. Some of them have relatives in 
other parts of Africa as well. The genera to which these endemic forms belong have 
mostly a wide distribution. Some of them range all over the Ethiopian region. Lophiomys 
extends from East Africa s. str. chiefly northeastwards, and Nesotragus southwards 
but the latter is also related to the genera Hylarnus and Neotragus of West Africa. 
Colobus, Heliosciurus, COricetomys and Lophuromys are represented as well to the east 
as to the west of the Kenia district, but do not reach to South Africa. The occur- 
rence of their members is thus chiefly bound to the tropical forests of Africa. In 
any case, whether the members of these latter genera are regarded as western or not, 
the fauna of Kenia shows a decided affinity with the fauna of the Western forest- 
region. 
Kenia and Kilimanjaro present certain analogies in many respects. Both of 
them are old extinguished volcanoes which rise from the hot plains at their feet to 
such a height that their tops are capped with perpetual snow, while their slopes are 
covered with the luxuriant growth of the tropical forest. It is thus only natural 
that their faunas shall offer several analogies as well. The number of identical 
species is not so great. They have been isolated too long for that, but in such cases 
when the species are not identical there are others present as substitutes and fill the 
place that otherwise would have been empty. The following list is meant to give 
a review of this even if additions might be made. 
