On the Ornithology of Northern Borneo. 185 



ITonibills (Bucerotidje), in wliicli tlie liumerus is moderate, 

 tlie ulna very long, and the manus extrenaely short. 



In Phcenicopterus (see figure, p. 184) the two free carpals, 

 radiale and ulnare, are large and well formed ; the three fused 

 distal carpals are also normal; there is an oval rudiment of the 

 fourth metacarpal (wc') on the inner face of the third at its 

 proximal end. The bony bridge over the outside of the long 

 interosseous space, formed by an intercalary element, is 

 aborted, and there is scarcely any flanging-out of the first 

 phalanx of the pollex and the second of the index^ such as is 

 seen in many long-winged birds, also due to secondary 

 elements; but the first phalanx of the index has the normal 

 dilatation. This phalanx has no interosseous space in it, 

 such as is seen in certain birds. The phalanx of the third digit 

 is only three fifths of the length of this dilated bone ; it 

 is slightly arcuate, and strongly attached to the other bone 

 on its ulnar edge. 



On the whole, this is a very perfectly formed wing, and is 

 more like that of an Ibis than that of a Goose, as, indeed, is 

 much of the structure ol Fhmnicopterus'^. 



XVI. — On the Ornithology of Northern Borneo. By R. 

 BowDLEK Sharpe, F.L.S., F.Z.S., &c. With Notes by 

 John Whitehead. — Part II. t 



(Plates VII., VIII.) 

 Fam. Oriolid^. 

 33. Oriolus xanthonotus. 



Oriolus xanthonotus, Horsf. ; Sharpe, Cat. B. iii. p. 213 ; 

 Salvad. Ucc. Born. p. 277; Sharpe, Ibis, 1879, p. 251. 



a. ? ad. Benkoka, Nov. 22, 1885. 



b. ? ad. Kina Balu, Jan. 14, 1888. 



c. S atl. Kina Balu, March 1887. 



d. ^ juv. Kina Balu, April 1888. 



* Professor Huxley (Proc. Zool. Soc. 18G7, p. 461) lias over.statfd the 

 Auseriue characters of this bird ; its " hasi-pterygoids '' are aborted, as in 

 the Ibises. ' 



t Cniitiuued from p. 8.j. 



