226 MR. A. H. EVERETT ON THE ZOO-GEOGRAPHICAL [Apr. 16, 
Taste 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 peculiar to the Palawan group are dis- 
tinguished by the prefix of a dagger. 
t1. Cittocinela nigra. +29. Hulabes palawanensis. 
2. Orthotomus ruficeps. +30. Corone pusilla. 
+3. Mixornis woodi. 31. Batrachostomus cornutus. 
t4. Turdinus rufifrons. 32. Caprimulgus macrurus. 
+5. Ptilocichla falcata. 33. Mulleripicus pulverulentus. 
+6. Anuropsis cinereiceps. +34. Thriponax hargitti. 
+7. Tole striaticeps. 135. Tiga everetti. : 
8. Micropus melanocephalus. 36. Alcedo asiatica. 
+9. Criniger frater. 37. Ceyx rufidorsa. 
110. palawanensis. 38. Halcyon coromanda. 
+11. Pycnonotus cinereifrons. 39. pileata. 
12, Adgithina viridis. +40. Anthracoceros lemprieri. 
+13. Chloropsis palawanensis. 41. Cuculus sonnerati. 
+14. Irena tweeddalii. 42, Surniculus lugubris. 
15. Oriolus xanthonotus. 43. Chrysococcyx xanthorhynchus. 
16. Dendrophila frontalis. 44, Eudynamis malayana. 
+17. Hyloterpe whiteheadi. +45, Dryococeyx harringtoni. 
18. Buchanga leucophea (?). 46. Centrococcyx javanensis. 
19. Artamides sumatrensis. 47. eurycercus. 
20. Pericrocotus igneus. 48, Ninox scutulata. 
21. Cryptolopha montis. 149. Syrnium whiteheadi. 
22. Siphia banyumas. 50, Spizaetus limnaetus. 
+23. erithacus. 51. Spilornis bacha. 
24, Chalcostethia insignis, +52. Baza leucopias. 
25. Anthreptes malaccensis. 53. Turtur tigrina. 
+26. Arachnothera dilutior. 54, Treron nasica. 
+27. Prionochilus johanne. 155. Polyplectron napoleonis '. 
28. Munia atricapilla. 
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 Dryococeyx 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 
from 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 
1 Said to occur also in Luzon, but this locality is probably erroneous. 
