BIRDS OF BILLITON. 121 



NOTE XI. 

 THE BIRDS OF BILLITON. 



A. G. VORDERMAN, 



Correspondiug Member of the Royal Academy of Sciences at Amsterdam. 



The Island of B i 1 1 i t o n is situated between Sumatra, 

 Borneo and Java. From a geological point of view , it 

 may be considered to be a continuation of the chain , form- 

 ed by the Malay Peninsula, the Mountains of the Rio uw- 

 and Linga Archipelago and of the Island of Banka, from 

 which latter it is separated by Strait Gaspar , while the to- 

 lerably broad Karimata Passage separates it from Borneo. 



Although Billiton lies in the centre of a zoologically 



*) Our readers will remember the communication in the Notes of last year, 

 from the hand of Dr. Jentink, on the Mammals collected by Dr. A. G. V or- 

 de rman on the Island of Billiton, during the month of June 1888. Shortly 

 afterwards the well-known Ornithologist of the Malay Archipelago published 

 the ornithological results of the same journey, in a paper: De vogels van 

 Billiton, in » Natuurkundig Tijdschrift voor Nederlandsch Indië" (deel L 

 (1890), pp.410 — B19). As the Mammals above mentioned are already publish- 

 ed in our Notes, and the Natuurkundig Tijdschrift not being easily accessible 

 to every Ornithologist, the mentioned paper, moreover, being printed in Dutch, 

 and ornithological investigations having been the principal reason of Mr. Vor- 

 derman's visit to the island, it may be advisable and Mr. Vorderman kindly 

 allows to publish here a brief extract from this interesting paper. The list of 

 Birds will immediately be followed by another, enumerating the Lepidopterous 

 Insects collected on the same trip, prepared by Mr. P. C. T. Snellen, and 

 originally published in the //Tijdschrift der Nederlandsche Entomologische 

 Vereeniging" (vol. XXXIII, p. 379, pi. 13). 



Leyden Museum, February 1891. J. Büttikofer. 



Notes from tlie Leyden Museum, Vol. XIII. 



