m 
Introduction: Geogi'aphical Distribution. 
The above totals for each area added together give the sum of 273-5. The 
percentage of “Doubtful” components in the Celebes avifauna is then: 
In the same manner the percentage of the other components is obtained. 
The total number of peculiar forms in Celebes is 108. Dividing 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 forms 
Indo-Australian 12 » 
Oriental (inch Bornean and Javan) . 29-25 » 
Philippine 23-75 » 
Lesser Sundan 13 » 
Australasian 20 >> 
108 
The table then affords the following percentages : 
Number of 
forms 
Comparative 
value 
Forms of doubtful affinities 
9-3 per cent 
29 per cent 
Forms of Indo-Australian affinities . . ' 
11-1 per cent 
11-3 percent 
Forms of Oriental affinities (incl. also strictly Bornean and Javan) 
27-0 per cent 
18-46 per cent 
Forms of Pliilippine affimties 
22-0 per cent 
16-27 per cent 
Forms of Tiesser Sundan affinities 
12-0 per cent 
5-5 per cent 
Forms of Moluccan affinities 
5-0 per cent 
2-6 per cent 
Forms of Papuasian and Australian affinities 
13-5 per cent 
16-94 per cent 
99-9 
100-07 
Thus, the forms of doubtful affinities in Celebes have the highest value, 
viz. a little over 3 each; 
those of Indo-Australian 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') comiionents 18-5 per cent, value 19-54 per cent 
') The Lesser Sundan forms are not added, being shared about equally between the Australian and 
Oriental Regions. 
