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 Moluccas, with a compara- 
tively scanty bird-fauna, on the 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 which inhabit the Moluccas and 
not Borneo or Java; these being the respective sources from 
which, primé 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. Nectarophila. 17. Hydrocissa. 
2. Pratincola (sp.) 10. Anthreptes (sp.) 18. Cranorrhinus. 
3. Trichastoma. 11. Munia (sp.) © . 19. Lyncornis. 
4, Oriolus (sp.) 12. Acridotheres, 20. Treron (sp.) 
5. Cyornis 13. Yungipicus. 21. Gallus (sp.) 
6. Hypothymis. 14, Mulleripicus. 22. Spilornis. 
7. Hylocharis. 15. Rhamphococcyx. 23. Butastur. 
8. AXthopyga. 16, Hierococcyx. 24. Pernis. 
GENERA DERIVED FROM THE Motuccas or Timor. 
1. Graucalus (sp.) 6. Tanygnathus. 11. Myristicivora (s. g.) 
2. Chalcostetha. 7. Trichoglossus, 12. Ducula (s. g.) 
3. Myzomela. 8. Scythrops (sp.) 13. Zoncenas (s. g.) 
4, Munia (sp.) 9. Turaccena. 14, Lamproteron (s. g.) 
5. Cacatua (sp.) 10. Reinwardtcenas (sp.) 15. Megapodius. 
These tables show a decided preponderance of Oriental 
over Australian forms. But we must remember that the imme- 
diately adjacent lands from whence the supply was derived, is 
