280 MR. A. R, WALLACE ON THE [June 28, 
Total length. Wing. Tail. Bill. 
in. in. in. in. 
C. cristata (Gilolo) ...... 184 123 74 1Z 
C. cristata (Batchian) .... 174 102 6 12 
C. cristata (Ternate), juv.?.. 17 102 64 14 
C. cristatella (Gilolo, Kao). 15 ~~ —110 54 14 
The iris is red in this species, whereas in C. cristata it is dark olive. 
Hab. Gilolo (Kao) (4. BR. W.). 
5. CACATUA OPHTHALMICA. 
Cacatua ophthalmica, Sclat. Proc. Zool. Soc. 1864, p. 188. 
C. ducorpsii, Sclater, P. Z. S. 1862, p. 141, pl. xrv. (err.). 
Hab. Solomon Islands? (Perhaps some adjacent island.) 
6. CACATUA DUCORPSII. 
Cacatua ducorpsii, H. & J. Voy. au Pole Sud, Zool. i, p. 108, t. 26. 
f.1; Sclater, P. Z. S. 1864, p. 187, Pl. XVII. 
Hab. Solomon Islands. 
Remark.—Both these species are now living in the Gardens of 
the Society. 
7. CACATUA TRITON. 
Plyctolophus triton, Temm. Consp. Gen. Ind. Arch. iii. p. 405. 
Hab. New Guinea (Goram, introduced) (4. R. W.). 
Remarks.—Numbers of this species are brought from the main- 
land of New Guinea by the trading inhabitants of the little island of 
Goram, where escaped birds have bred, and are now very common. 
8. CACATUA MACROLOPHA. 
Plyctolophus macrolophus, Bernst. Cab. Journ. 1861, p. 46. 
Hab. Aru Islands, Mysol, Waigiou, and Salwatty (4. R. W.). 
Remarks.—This has been confounded with the last, and with 
Temminck’s C. equatorialis, It is intermediate in size between the 
two. 
9. CACATUA ZQUATORIALIS, 
Plyctolophus equatorialis, Temm. Consp. Gen. Ind. Arch. iii. 
p. 405. 
Hab. Celebes, Flores, and Lombock (4. R. W.). 
Remarks.—This is of the same size as C. sulphurea, but has a much 
larger bill. 
10. CACATUA SULPHUREA, 
Psittacus sulphureus, Gm. Syst. Nat. i. p. 330; Pl. Enl. 14; 
Lear. Parr. pl. 4. 
Hab. Timor (4, R. W.). 
11. CACATUA CITRINO-CRISTATA. 
Plyctolophus citrino-cristatus, Fr. Proc. Zool. Soc. 1844, p. 38. 
Hab. Timor-laut. 
