226 MR. A. H. EVERETT ON THE ZOO-GEOGRAPHICAL [Apr. 16, 



Table III. — Showing the Palawan Species which are identical with 

 or allied to Species inhabiting Borneo or western Indo-Malaya, 

 but which are not found in the Philippines except as migrants 

 or stragglers. Species pecuhar to the Palawan group are dis- 

 tinguished by the prefix of a dagger. 



tl. Cittociiicla nigra. 

 2. Orthotomus ruficeps. 

 t3. Mixornis woodi. 



t4. Turdinns rufifrous. 



t5. Ptilocichla folcata. 



t6. Anuropsis ciuereiceps. 



t7. lole striaticeps. 

 8. Micropus raelanocephalus. 



t9. Criniger frater. 



tlO. palawanensis. 



til. Pycnonotus cinereifrons. 



12. .^githina viridis. 

 113. Chloropsis palawanensis. 

 tl4. Irena tvveeddalii. 



15. Oriolus xanthonotus. 



16. Dendrophila frontalis. 

 +17. Hyloterpe wliiteheadi. 



18. Buchanga leucopbasa (?), 



19. Artamides sumatrensis. 



20. Pericrocotus igneus. 



21. Cryptolopha montis. 



22. Sipbia banyumas. 

 +23. erithaciis. 



24. Cbalcostetbia insignis. 



25. Antbreptes malaccensis. 

 +25. Aracbiiotbera dilutior. 

 +27. PrionocbiUis jobanna\ 



28. Munia atricapilla. 



+29. Eulabes palawanensis. 

 +30. Corone jiusilla. 



31. Batracbostomus cornutiis. 



32. Oaprimulgus macriirus. 



33. Mullerijjicus pulverulentus. 

 +34. Tbriponax bargitti. 



+3.5. Tiga everetti. 



36. Alcedo asiatica. 



37. Oeyx ruiidorsa. 



38. Halcyon coromanda. 



39. pileata. 



+40. Antbracoceros lemprieri. 



41. Cuculus sonnerati. 



42. Suruiculu.s lugubris. 



43. Chrysococcyx xauthorhyncbus. 



44. Eudyuamis malayaua. 

 +45. Dryococcyx barringtoui. 



46. Centrococcyx javauensis. 



47. eurycercus. 



48. Ninox scutulata. 

 +49. Syrnium whitebeadi. 



50. Spizaetus limnaetus. 



51. Spilornis bacba. 

 +.52. Baza leucopias. 



53. Turtiir tigrina. 



54. Treron nasica. 



+55. Polyplectron uapoleonis ' . 



A consideration of the foregoing tables reveals the facts : (1) that 

 the only two genera of birds which are confined to the Palawan 

 group, namely Dryococcrjx and Ptilocichla, are allied to genera 

 belonging to the typical Indo-Malayan and not to the Philippine 

 sub-area ; (2) that the preponderance of the species belonging to 

 the former sub-area over those belonging to the latter is as 55 to 

 31; and (3) that whereas of the 31 Philippine species only 9 have 

 varied and become distinct forms confined to the Palawan group, 

 no fewer than 24 of the 55 Bornean and western Indo-Malayan 

 species have thus varied, the variation being also, as a general rule, 

 more profound in character than is the case with the Philippine 

 species. From these facts it is apparent that not only has a larger 

 proportion of the existing bird-population entered the Palawan group 

 irom the Bornean side than has invaded it from the Philippines, 

 but also that the western element represents the fundamental ornis, 

 since it exhibits a markedly higher degree of differentiation, which 

 is nearly certainly indicative of its greater antiquity and longer 

 isolation. 



Thus the results obtained by an analysis of the avifauna of Pala- 

 wan, so far as it is known, reinforce those already arrived at by our 

 ^ Said to occur also in Luzon, but this locality is probably erroneous. 



