4. CACATUA. 125 



(1-174) ; Roaetib. Reist. naor Geehinkb. p. 6 (1875) ; id. Zool. Cart. 



1878, p. 3-47 ; id. Malay. Arch. p. 407 (1879) ; Schmidt, P. Z. S. 



L880, p. 309. 

 Cacatua leucolophus, Less. Tr. d'Orn. p. 182 (1831). 

 Plyctolophua cristatas, Benn. Pr. Zool. Son. 1834, p. 41 : Bp. ConspA. 



p. 7 (1850); id. Com.pt. Rend. xxx. p. 138 (1850) ; Rosenb. Journ. 



f. Orn. 1862, p. 62; id. Nat. rijdschr. Ned. lad. xxv. pp.. 141, 142 



(1863); Nitzsch, Pteryhgr. (EngL ed.) p. 102 (1867). 

 KaUdoe cristatas, Bourj.Perr. pi. 82 (1837-38). 

 Psittacus albo-ciistatus, Bourj. Pen:, lad. Gen. p. xlvii (1837-38). 

 Psittacus orientalis, Temm. (nee Lath.) Tabl. Mith. p. 56 (1839). 

 Piyctolophus leucolophus, Dp. Compt. Read. xxx. p. 138 (1850). 

 Cacatua albocristata, Finsch, Ned. Tijdschr. Dierk. i. Berigten, 



p. xxi (1863). 

 Cacatua sp., Sclat. P. Z. S. 1864, p. 160. 

 Cacatua cristatella, Wall. P. Z. S. 1864, pp. 279, 280, 293 (var. 



minor) (type examined) ; G. R. Gr. Hand-list, ii. p. 169, n. 8394 



(1870). 

 Plictolophus leucolophus, Finsch, Papag. i. p. 283 (1867); Rchnw. 



Vogelbild. t. iv. f.3 (1878-83). 

 Cacatua alba, G. R. Gr. Hand-list, ii. p. 169, n. 8386 (1870) ; Saload. 



Orn.Pap.eMoL i. p. 0!) (1880); Pleske, Bull. Ac. St. Peter-<h. 



xxix. p. 523 (1884); Guillem. P. Z. S. 1885, p. 562 (Batchian, 



Bisa Isl., Obi Group) ; Salvad. Mem. R. Ac. Sc. Tor. ser. 2, xl. 



155 (1889) ; Tristr. Cat. Coll. B. p. 72 (1889). 

 Plissolophus albus, Rchnw. Journ. f. Orn. 1881, p. 27 (Consp. Psitt. 



P . 27). 



Adult. White ; also the crest is entirely white : base of the inner 

 web of the quills and tail-feathers sulphur-yellow ; naked skm 

 round the eyes bluish white : iris red or dark olive; bill and feet 

 black. Total length 18 inches, wing 12-4, tail 7*4, bill 1-8, 

 tarsus 1-1. 



Hub. The Halmahera group : Halmahera, Ternate, Tidore, Bat- 

 chian, Obi Islands. 



Specimens from Kau, on the northern peninsula of Halmahera, 

 are generally much smaller and have been specifically separated 

 as C. cristatella, Wall. ; but the difference does not seem constaut, and 

 besides through all the region inhabited by C. alba larger and 

 smaller specimens are to be found. 



«. Ad. St. Moluccas. Zoological Society. 



b. Ad. st. Moluccas. Purchased. 



c. Ad. st. Halmahera. A. II. Wallace Coll. 



d. rfad. sk. Ternate. A. R. Wallace Coll. 



e. 2 ad. sk. Ternate (A. B. Meuer}. Tweeddale Coll. 

 /. $>ad. ak. Batchian (A. R. Wallace). Gould Coll. 



g. Ad. sk. Batchian. Dr. A. B. Meyer [C.]. 



h. Ad. sk. Kau, N. Halmahera. A. R. Wallace Coll. 



(Type of Cacatua cristatella, Wall.) 

 i Skeleton. 



8. Cacatua ophthalmica. 



Cacatua ducorpsii, Sclat. (nee Hombr.) P. Z. S. 1862, p. 141, pi. xiv. 

 Cacatua ophthalmica, Sclat. P. Z. S. 1864, pp. 188, 189 ; Watt. 



