CHAP, xiii.] THE AUSTRALIAN REGION. 429 



Australian origin, the remainder being common to both regions. 

 This shows a preponderant recent immigration from the West 

 and North, which is not to be wondered at when we look at the 

 long coast line of Java, Borneo, and the Philippine islands, with 

 an abundant and varied bird population, on the one side, and 

 the small scattered islands of the INIoluccas, with a compara- 

 tively scanty bird-fauna, on tlie other. 



But, adopting the method here usually followed, let us look 

 at the relations of the genera found in Celebes, omitting for 

 the present those which are peculiar to it. I divide these genera 

 into two series : — those which are found in Borneo or Java but 

 not in the Moluccas, and those wdiich inhabit the Moluccas and 

 not Borneo or Java ; these being the respective sources from 

 which, primd facie, the species of these genera must have been 

 derived. Genera which range widely into both these districts 

 are rejected, as teaching us nothing of the origin of the Cele- 

 besian fauna. In a few cases, sub-genera which show a decided 

 eastern or western origin, are given. 



Genera derived from Borneo and Java. 



1. Geocichla. 9. Nectiirophila. 17. Hydrocissa. 



2. Pratiucola (sp.) 10. Anthreptes (sp.) 18. Cranorrhiuus. 



3. Trichastoma. 11. Mania (sp.) 19. Lyncornis. 



4. Oriolus (sp.) 12. Acridotheres. 20. Treron (sp.) 



5. Cyornis 13. Yuup;ipicus. 21. Gallus (sp.) 

 (i. Hypothymis. 14. Miilleripicus. 22. Spilornis. 



7. Hylocliaris. 15. Rhamphococcyx. 23. Butastur. 



8. /Ethopyga. 16. Hierococcyx. 24. Pernis. 



Genera derived from the Moluccas or Timor. 



1. Graucalus (sp.) 6. Tanygnathus. 11. Myristicivora (s. g.) 



2. Chalcostetha. 7. Trichoglossus. 12. Ducula (s. g.) 



3. Myzoraela. S. Scythrops (sp.) 13. Zonoenas (s. g.) 



4. Mimia (sp.) 9. Turacoena. 14. Lamproterou (s. g.) ■ 



5. Cacatua (sp.) 10. Reinwardtcenas (sp.) 15. Megapodius. 



These tables show a decided preponderance of Oriental 

 over Australian forms. But we nuist remember that tlie imme- 

 diately adjacent lands from whence the supply was derived, is 



