118 



Introduction: Geographical Distribution. 



The above totals for each area added together give the sum of 273-5. 

 percentage of "Doubtful" components in the Celebes avifauna is then: 



79 X 100 



The 



273-5 



or 29 per cent. 



In the same manner the percentage of the other components is obtained. 



The total number of peculiar forms in Celebes is 108. Di^•iding the value 

 of a species where the nearest affinities with these peculiar forms are found in 

 two or more of the neighbouring areas, the shares are: 



Doubtful 10 



Indo -Australian 12 



Oriental (incl. Bornean and Javan 29-25 



Philippine 23-75 



Lesser Sundan 13 



Australasian 20 



forms 



108 



The table then affords the following percentages : 



I 



Number of 

 forms 



Comparative 

 value 



Forms of doubtful affinities j 9 



Forms of Indo-Australian affinities 11 



Forms of Oriental affinities incl. also strictly Bornean and Javan) 27 



Forms of Philippine affinities 22 



Forms of Lesser Sundan affinities 12 



Forms of IVroluccan affinities 5 



Forms of Papuasian and Australian affinities 13 



99 



3 per cent 

 ] per cent 

 per cent 

 per cent 

 per cent 

 per cent 

 5 per cent 



29 per cent 

 11-3 percent 

 18-46 per cent 

 16-27 per cent 

 5-5 per cent 

 2-6 per cent 

 16-9-1 per cent 



|l00-07 



Thus, the forms of doubtful affinities in Celebes have the highest value, 

 viz. a little over 3 each ; 



those of Indo-Australinn and of Australasian affinities have the value 1 



those of the Oriental Region about -7 



those of the Philippines about -74 



those of the Lesser Sunda Islands only about -5. 



Consequently, the "Doubtful" elements seem to be the oldest, and the Lesser 

 Sundan generally the most recent in Celebes. 



Including the Philippines in the Oriental Region, and comparing the area 

 thus formed with the Australian Region, Celebes shows itself to be decidedly 

 Oriental. 



Oriental components . . 49 per cent, value 35-73 per cent 

 Australasian' components 18-5 per cent, value 19-54 percent 



'■ The Lesser Sundan forms are not added, being shared about equally between the Australian and 

 Oriental Kegions. 



