DUTCH BORNEO-EXPEDITION. 147 
specimens, representing 165 species, only 26 species which 
were not stated by myself from the western side of the 
watershed, and none were obtained which most likely would 
not occur in the Kapoeas-basin as well. 
With such a great number of species, this collection is 
quite sufficient to state that east from the watershed the 
ornis does not show any essential difference from that of 
the Kapoeas-region. It may now, as I already suggested 
in my introduction to the enumeration of the mammals, 
be considered as a matter of fact that the homogenity of 
the ornis of Borneo is extremely great throughout the vast 
island, especially as far as the lowland up to an altitude 
of 1000 meter is concerned. 
The region of the Upper Kapoeas having previously 
been entirely unexplored, I expected to obtain a number 
of new species, especially in the mountain-forests, but 
although I worked very hard in collecting as many 
interesting species as possible, paying special attention to 
the smaller and more unobvious forms, there is not a 
single really new form among the 269 species collected, 
and only two species (Harpactes orrhophaeus and Cyano- 
derma poliogaster), already known from other islands or 
from the Continent, were obtained which had not been 
recorded before from Borneo. 
These facts are pleading very strongly for the perse- 
verance and the great success with which the Kina Balu 
and the mountainous interior of Sarawak have been explo- 
red by energetic naturalists as Whitehead, Hverett and 
Hose, who added so many new species, especially mountain 
forms, that we were not able to enrich this great number 
with a single new species. 
The specimens treated of in the present paper, have been 
collected in the following localities and on the following 
dates '). 
1) As to the geographical position of these localities see the map in the 
above-mentioned introduction. 
Notes from the Leyden Museum, Vol. XXI. 
