58 



THE VOYAGE OF H.M.S. CHALLENGER. 



Peale's figure is somewhat incorrect ; the head appears too blue, and has uo purplish- 

 red margin ; the remiges are not coloured blue. 



The very interesting fact of the very localised distribution of the numerous species of 

 the genus Ptilorwpus in the Pacific archipelago is most strongly exemplified by this 

 species, peculiar to the Tahiti group. The pale purplish-lilac cap and the want of the 

 usual dark vent-spot, distinguish this species at once as regards coloration. But, besides, 

 it is very well characterised by the form of the first primary, which gradually tapers 

 towards its extremity, whereas in the other Polynesian species before me (P. 

 fasciatus, porphyraceus, pelewensis, iwnapensis, pcronsei, an d ditpctit-thouarsi) this 

 feather is suddenly attenuated in the apical half. 



4. Ardea sacra, Gm. 



AnJea sacra, Gm. : Finsch, Proc. Zool. Soc., 1877, p. 742. 



[No. 562. Tahiti. Female. 



Young. 



No. 563. 



Eyes orange ; feet and legs greenish in the adult.] 



No. 562 is white, strongly developing slate-blue feathers; No. 563 is slate-coloured, 

 with a broad white chin-stripe. 



IV. — On the Birds collected in Ternate, Amboyna, Banda, the Ki Islands, and the 

 Arrou Islands. By T. Salvadori, C.M.Z.S. 



(Plates XVIII to XX.) 



(Reprinted from the Proceedings of the Zoological Society of London for 1878.) 



The collection of birds made at the above-mentioned localities is not very large, 

 numbering only 131 specimens, belonging to 79 species. None of these are new to 



