1898. 
1898. 
1904. 
PONGO 19] 
From Sumatra his material was much less extensive, and all 
of it was obtained from the Langkat District. He recognized 
one species Pithecus sumatranus, and two races, P. s. deliensis, 
and P. s. obongensis. At present the writer considers all these 
the same as Ponco pyGMz#us, the material thus far obtained 
not being sufficient for establishing distinct forms, the variations 
existing both in the color of the fur, and in the crania, even 
in individuals from the same locality, being too great to permit 
the selection of any specimen as possibly representing a distinct 
form. Like Bornean examples, some old males possess 
cheek callosities, others, equally old, not having them. But if 
at some later day more ample material proves that the Sumatran 
Ourang is distinct from the Bornean, then these races and 
species named by Selenka must be known as Pongo abelii 
(Clarke). 
Selenka, Studien uber Entwickelungsgeschichte der Tier, 
Sechstes Heft, Menschenaffen. 
The various races given in the previous paper are here re- 
peated, and their distinction is attempted by the cubical dimen- 
sions of the braincase, which cannot be said either to be 
satisfactory or in any way final; variation both in the size and 
shape of the braincase being too great among individuals ever 
to permit this method to be accepted as conclusive. 
Selenka, Studien uber Entwickelungsgeschichte der Tier, Ste- 
bentes Heft, Menschenaffen. 
In this paper comparison is made of the capacity of the brain- 
case, and the shape and size of the teeth of the Ourang, 
Gorilla, and Chimpanzee. No species or races in either of the 
genera are predicated upon the differences observable. 
W. Rothschild, in Proceedings of the Zoological Society of 
London. 
In this paper, after some remarks upon the contributions of 
Messrs. Matschie and Selenka to our knowledge of the Great 
Apes, the Author presents his view regarding the specific 
status of Ourangs. While considering the presence or absence 
of the cheek callosities to be dimorphic, and not indicating a 
distinct form, he, nevertheless, confers names upon these acci- 
dents of nature, and thus creates them subspecies, a conclusion 
not likely to be seriously entertained or adopted. One species 
