VISCOUNT WALDEN ON THE BIRDS OF CELEBES. 51 
p- 319). Dr. O. Finsch (/.¢. p. 298), on the contrary, says that he has seen undoubted 
Celebean examples with the iris almost black. Mr. G. R. Gray (Hand-list, no. 8395) 
enumerates C. equatorialis, Temm., as the title of a second Celebean species of Cacatua: 
Temminck’s title was given in fact to C. sulphurea (Gm.), and there is no evidence of 
two species of Cockatoo occurring in Celebes. 
PSITTACIDZ. 
TaNyenatuus, Wagler. 
2. TanyenatnHus minert (S. Miiller & Schlegel), Verhandl. Land- en Volkenk. p. 108, 
“Celebes ” (1839). 
Psittacus sumatranus, Raffles, Trans. Linn. Soe. xiii. p- 281, “Sumatra” (1822). 
Tanygnathus albirostris, Wallace, P. Z. S. 1862, p. 336, “ Celebes and Sula Islands.” 
Eclectus miilleri (Temm.), O. Finsch, Papag. p. 357 ; Schlegel, Nederl. Tijdschr. 1866, p. 185. 
Hab. Macassar, Menado, Sula Islands (Wallace); Sanghir Islands (Schlegel); Sama 
Island (Cuming). 
Professor Schlegel and Dr. O. Finsch affirm that the white-billed form (L. albirostris) 
represents only a phase of colouring, and is not a species distinct from the red-billed 
TL. miilleri. The evidence which they have produced in support of this view (O. Finsch, 
Papag. ii. p. 361) is strong; and examples of both forms in my own collection appear 
to belong to the same species. Mr. Wallace, on the other hand, maintains that the two 
birds are distinct species, and recently has written to me that “ 7. albirostris is certainly 
distinct.” While Dr. O. Finsch (/. ¢.) states that he has seen living examples in the 
Amsterdam Zoological Gardens with the white bill passing into the red bill of 7. 
miillert, Mr. Wallace informs us (/. c.) that the ery of 7. albirostris is different from that 
of 7. miilleri, and that the white-billed form “ is universally recognized by the natives 
of Celebes as another bird.” Between the highest authority on the Psittaci and the 
greatest field-naturalist of the day it is difficult to decide; and we must leave the ques- 
tion open for further investigation. 
If the white-billed species prove distinct, it will have in strictness to take the title 
of sumatranus of Raffles. And if both forms prove to be the same species, the title 
of mitllert will have to fall. In his remarks on Raffles’s title, Dr. O. Finsch (7. ¢.) has 
somewhat misunderstood Sir Stamford’s words. ‘That author distinctly left it to be 
understood that his P. swmatranus was an indigenous Sumatran species. That it is not 
an inhabitant of Sumatra seems to be quite established. 
