THE BIRDS OF SOUTH-WEST AND PENINSULAR SIAM. 15 



The result of our work shows that, so far as Siam is concern- 

 ed, the Malayan fauna stops short at the Pakchan river, whence, at low 

 levels northward, it is purely Indo-Burmese. What the fauna is on 

 the high dividing rano^e between Siam and Tenasserim, which in 

 places reaches 5,000 feet, we are unable to say ; but from a distance 

 the range does not Jook heavily forested. Possibly it may contain 

 forms identical with those of Nwalabo and Muleyit, j)Ossibly more 

 southern forms ; but everything is necessarily pure conjecture. 



In Tenasserim, on the other hand, the Malayan fauna continues 

 almost undiluted as far as Tavoy. Its greater extension 0]i this side, 

 it is perhaps trite to remark, is evidently connected with the 

 persistence of evergreen forests which, again, is due to the apparently 

 much heavier rainfall on the western than on the Siamese side. 



Other Localities. 



In the various papers on collections made by us in this region, 

 references to which will be found in the bibliography, brief accounts 

 will be found of the various collecting stations, which are not 

 specifically mentioned in the proceding pages. We do not think it 

 necessary to repeat these accounts. 



VOL. V, NO. 1, 1921. 



