DUTCH BORNEO-EXPEDITION, 149 
Poetoes Sibau Nos 1—25 (May 16th—June 9th 1896). 
Long Bloe River (a southern tributary of the Upper 
Mahakkam) Nos 26—81 (September 10th—October 
26th 1896); Nos 94-98 (November 12th—28rd 1896); 
Nes 121—127 (December 10th—20th 1896); Nos 138— 
145 (January 26th—May 10th 1897). 
Bruny River (a southern tributary of the Long Bloe 
River) Nes 99—116 (November 27th—December 16th 
1896); Nes 128—137 (January 16¢h—25th 1897). 
Lower Mahakkam River Nos 146—174 (May 10th— 
25th 1897). 
This collection was accompanied by a journal from the 
hand of Mr, von Berchtold, with a number of interesting 
field-notes which are made use of in the present paper, 
with the exception of the vernacular names. These latter, 
as a rule, have not the value ascribed to by several authors, 
as they very often are untrustworthy and misleading. It 
happens not seldom that one and the same name is be- 
stowed upon several species (manau tana — ground-bird on all 
the species of Pitta and some other terrestrial birds) or 
that quite different names, even in the same places and 
by the same people, are in use for one and the same 
species. 
A very large and important bird-collection has been 
made by Dr. Nieuwenhuis on his second voyage on the 
Upper Mahakkam from November 20th 1898 to March 
Ist 1899. This collection arrived in the Leyden Museum 
a week ago and was enregistered in the present paper after 
this latter was made ready for the press. The collection 
contains 658 specimens representing 141 species, ten of 
which had not been represented in our previous collections. 
Dr. Nieuwenhuis having meanwhile undertaken a new 
expedition in East-Borneo, this time more to the north, 
we may hope that he will be able to continue his col- 
lecting work in a territory which is zoologically still quite 
unknown, and that his new collections will strongly 
increase our knowledge of the ornis of the island, though 
Notes from the Leyden Museum, Vol. XXI. 
