PAN 233 
P. vellerosus (Matschie), (nec Gray), is a mixture of that 
species and P. ausryl, which is a natural sequence, for at that 
time Herr Matschie regarded P. vELLEROosus and P. AUBRYI as. 
the same. The Author has omitted P. catvus (Du Chaillu), 
both from his Key and Synopsis but makes it a synonym of P. 
SATyRUS (Linn.), see p. 430. He also regards Gorilla MAYEMA 
Alix et Bouvier, as a large Ape of the P. vellerosus type. 
GEOGRAPHICAL DISTRIBUTION OF THE SPECIES. 
It cannot be said that, at the present time, we know the limits 
of the range of any of the recognized species of Chimpanzee. Several 
of them are known to inhabit the same districts of the West African 
coasts, but exactly how they may be distributed in the localities they 
frequent has not been ascertained. Gaboon is supposed to contain five 
species, or species and races as different writers may regard them, and 
Cameroon has four, with possibly three more not yet described. Of 
these so far as known there are only two of the recognized species 
which do not inhabit both Cameroon and Gaboon, viz.: P. saTyRUS not 
found in Cameroon and P. vELLEROSUsS net met with in Gaboon, leaving 
three found in both districts, and three as yet unrecognized specimens 
in the Berlin Museum, restricted, as supposed, to certain districts in 
Cameroon. If our determinations are correct, we have the singular 
fact that nearly all the recognized forms of Chimpanzees, like the 
Gorillas, are crowded together on a small portion of West Africa, 
leaving us to wonder how so many distinct forms, if they are such, 
could exist in so restricted a territory and preserve their specific 
characters intact. 
Commencing on the West African coast at the most northern 
_ point where these Apes are known to dwell, we have P. CHIMPANSE 
from Gambia, and P. LEUCOPRYMNUS, said to have come originally 
from Guinea, but supposed to range from Sierra Leone to Liberia, but 
this distribution cannot be said to be satisfactorily authenticated. P. 
FuUSCUS is stated to have come from the Gold Coast, but as there is no 
specimen of this form in any collection, its habitat is at best but 
obscure. In Cameroon is P. vELLEROsUS not as yet found elsewhere, 
and ranging from Cameroon into Gaboon are P. caLvus, P. AUBRYI 
and P. KOOLOO-KAMBA. P. sATyRUus is apparently restricted to Gaboon, 
while P. ruLicINosus ranges from Gaboon into French Congo, but its 
limits are not known. From Basho, Dunne and Lomie, interior of 
Cameroon, are specimens in the Berlin Museum which appear to differ 
