2 The Philippine Journal of Science 1923 



we must of necessity assume for the Philippines, for example, 

 that our flora developed antecedent to much of our fauna. It 

 is, therefore, assumed that the geographic distribution of generic 

 types of plants characteristic of the primary forests of Malaysia, 

 eliminating those known to be distributed by the wind and by 

 water, which are comparatively few, forms a more-reliable basis 

 for tracing previous land connections than does the present-day 

 distribution of most groups of animals. 



The sharply defined family Dipterocarpaceae is essentially 

 confined to India and Malaysia. It has no representative in 

 tropical America or in tropical Australia, while in Africa it is 

 represented by a single species of the genus Vatica and by 

 thirteen species of the anomalous genus Monotes, which some 

 authorities do not admit as a member of this family. 



As at present understood, including- the African genus Monotes, 



the family comprises seventeen genera and about three hundred 



seventy-seven species. 1 Excepting the African genus men- 



Table 1.— Geographic distribution of the genera and species of 



Dipterocarpaceae. 



Genera. 



1 



1 



1 

 < 



J 

 1 

 1 



I 



1 



h 

 r 

 i 



1 

 1 



§ 



i 

 1 



i* 



Anisoptera 



i 











K 



28 



■ 



4 









i 



2 



Cot'Jdo'uum 







2';r w "-; ~ 







15 





"°* r 2- 







7 



; 



"» 



" 



J 



3 



SET 







2 





13 























tt 



" '~46* 



L8 



3 " 







■i 



3 



...... 



z 



; 













■2 4 



16 



4 



4 



J r^^^^^^ 



M 



1 47 



13 



185 



144 



50 



14 



"This estimate : 



n reductions and transfers made 

 is described since 1895 have been 



His figures have been modified 



ublished, and 



