150 BIRDS OF THE 



we may not expect many forms not stated already from 

 Central-Borneo. 



For conveniances sake I have adopted in the present 

 list, with but a few exceptions, the systematical arrange- 

 ment used by Count Salvadori in his »Catalogo sistematico 

 degli Uccelli di Borneo", published in »Annali del Museo 

 Civico di Storia Naturale di Genova, 1874", which excel- 

 lent work, treating of 392 species, may still be considered 

 the most important publication on this subject ^). 



Another review of the birds of Borneo, enumerating 472 

 species, has been published by Dr. Vorderman under the 

 title: »Liste des Oiseaux de Borneo" in Natuurkundig Tijd- 

 schrift van Nederlandsch Indie, Vol. XLVI, afl. 3 (1887). 



A very important review of the birds of Borneo, worked 

 up to date, is A. H. Everett's »List of the Birds of the 

 Bornean Group of Islands" in the Journal of the Straits 

 Branch Royal Asiatict. Society, 1889, pp. 91 — 212, with 

 map 2). This list treats of not less than 570 species, a 

 good number of which however are restricted to the island 

 of Palawan, an island which cannot readily be understood 

 as belonging to the » Bornean group of Islands". Since 

 the issue of this useful publication, very successful explo- 

 rations have been made by Mr. Charles Hose and also by 

 Mr. Everett in the Baram valley and the mountainous 

 interior of Sarawak. Especially in this latter region the 

 work of these indefatigable explorers was crowned with 

 enormous success, especially with regard to the great num- 

 ber of new species discovered in the dense and inaccessable 

 mountain-forests (Mount Penrisen, Mount Kalulong, Mount 

 Mulu, Mount Dulit and other mountains with an eleva- 

 tion of more than 1000 meter above the level of the sea). 



As I already pointed to in my above-mentioned intro- 

 duction, I was able to state some of those special moun- 



1) This work is quoted in the follovying list under the abbreviated form of 

 ,Salvad. Ucc. Born." 



2) Quoted hereafter as «Everett, L. B. Born." 



Notes from the Leyden Museum, Vol. XXI. 



