232 
PAN 
FURTHI (Giglioli); S. s. marungensis (Noack); S. KOOLOo- 
KAMBA (Du Chaillu) ; S. Aausryr (Alix et Gratiolet) ; S. pye- 
Mus (Schreber); S. p. Fuscus (Meyer) ; S. p. LEUCOPRYM- 
nus (Lesson) ; S. p. CHIMPANSE (Matschie) ; and S. p. raripi- 
losus Rothsch., = S. FuLicinosus (Schaufuss). 
The arrangement of the species and subspecies is difficult to 
understand as it does not anywhere appear that intermediates 
of any of the recognized forms have been obtained, and the 
geographical distribution of some of these would seem to pre- 
clude one from being a race of the other, e. g. PAN SCHWEIN- 
FURTHI from the Soudan and Uganda, and Pan satyrus from 
Cameroon and Gaboon. They may exist, but I have never seen 
any connecting links between those forms. Then it does not 
seem advisable to consider P. FULIGINOSUS an entirely black 
Chimpanzee from the French Congo, as a race of P. VELLERO- 
sus, a brown Chimpanzee from Cameroon, especially as it is 
not known if their ranges approach each other at any point. A 
number of figures are given in the text of different Chim- 
panzees taken from life, which show the distribution of dark 
and light colors on the face, and enable the different species to 
be recognized, and keys are also supplied for distinguishing 
the various forms. It has yet to be proved, however, that two 
or more species of these Apes inhabit the same districts as this 
Author believes, for at present there is no material extant that 
enables this to be demonstrated. Thus far the material in the 
Berlin Museum, which is, without exception, the most exten- 
sive to be found anywhere, instead of assisting us to solve the 
problem of how many species exist, only makes it more difficult 
than ever, for the skulls present such endless variations, and 
the skins, by the diverse coloring of the fur, and the different 
hues and disposal of tints on the face, hands and feet, exhibited 
at times in examples from the same locality, that it is practically 
impossible to decide how many species really do exist, or if too 
many have not already been recognized. Herr Matschie has 
given much thought and study to this material, but was not 
by any means satisfied, at the time I examined these specimens 
with him, that the correct number of species had been demon- 
strated. Also which examples represent races, and which 
species, has by no means been ascertained. 
The Author of this paper considers that P. caluus (Matschie), 
(nec Du Chaillu), is the same as P. vELLEROsus (Gray) ; and 
