108 
But in Celebes both varieties are living together. 
If this supposition be right, we may only speak of Macacus mau- 
rus F. Cuvier (1823), as this is the older name with the synonym 
ocreatus Ogilby (1840). 
This question is not without real importance. 
There are known only three species of Macacus, very remarkably 
characterized by an extremely short tail and a simply coloured fur. 
One of them, M. arctoides, from Burma to Cochinchina, is by its red 
face strongly distinguished from the two others. These : Macacus mau- 
rus and ocreatus have black faces and are also in other respects very 
different from M. arctoides. Is my supposition right, that both are 
variations of one species, both only living in Celebes, then Celebes 
has one extremely characteristic animal more. With Babirusa alfurus, 
Cynopithecus niger, Anoa depressicornis , Paradoxurus musschen- 
broekii, — Macacus maurus F. Cuv. (ocreatus Ogilby) is one more 
of these remarkable animals peculiar only to that island with a con- 
tinental character. 
Pbosimiae. 
Nycticehus. 
Nycticebus tardigradus Fischer. 
Sumatra: Singkarah and Solok; four specimens (106, 144, 146, 620). 
The weight of the brain I found in one specimen as follows: 
cf n°. 106. head and body .... 31,5 cm. 
tail .... 1,5 cm. 
weight of body .... 500 gr. 
weight of brain .... 8,8 gr. 
The proportion of the weight of brain to the weight of the body 
is 1,63%. 
Caenivoea. 
Felis. 
Felis tigris Linné. 
Sumatra: Fort de Kock; skull (206). 
Java: Preanger Regencies; skull (283). 
Felis pardus Linné. 
Java: Preanger Regencies; skull (284). 
