240 MICROGLOSSUS ATERRIMUS STENOLOPHUS. 
measuring: 6’, wing 386—400 mm., culmen 97— 
103 mm.; QQ, wing 380—400 mm., culmen 79—108 mm, 
Much smaller are the specimens (15) from the Noord River, 
South New Guinea, measuring: Jc, wing 373—374 mm, 
culmen 101—111 mm.; QQ, wing 334—3865 mm, culmen - 
72—84 mm. 
Individuals from all the named localities differ only in 
size, not in plumage. I have not seen examples from Aus- 
tralia, but according to Schlegel and to Finsch these are 
smaller than those from Northwest New Guinea, Waigeoe 
and Salawatti. They likely agree with examples from South 
New Guinea, 
The material at my disposal is too insufficient as to say 
how many forms, except that of the Aroe Islands, are to 
be recognised. When the examples from Australia and 
from South New Guinea are constantly smaller, then the 
large examples from Northwest New Guinea also must be 
separated subspecifically. 
There are however in the Leyden Museum two adult 
black cockatoos from the Northcoast of New Guinea, a 
male from the Humboldt Bay 23 March 1903 and a female 
from Lake Sentani 28 June 1903, collected by Messrs, de 
Beaufort and Lorentz during the Wichmann Expedition. 
These birds are quite differing from the other specimens 
in our collection by the shape of the crestfeathers, These 
feathers are much narrower, about the half, and more 
pointed than those of the specimens from the other loca- 
lities, except a specimen from the island of Jobi in the 
Geelvink Bay, in which the crestfeathers are also narrower, 
but less than in the two above-named birds. The difference 
is so conspicuous, that I separate the birds from the Hum- 
boldt Bay under the name of 
Microglossus aterrimus stenolophus, nov. subsp. 
They measure: o’, wing 393 mm, culmen 114 mm.; Q, 
wing 359 mm., culmen 87 mm. 
The specimen from Jobi has the crestfeathers a little 
broader, but still much narrower than those of the speci- 
mens from Dorei and other localities; it is intermediate 
between those from the Humboldt Bay and from West 
New Guinea and probably belongs to another subspecies. 
This specimen, a male, measures: wing 362, culmen 96 mm. 
Leyden Museum, April 1911. 
Notes from the Leyden Museum, Vol. XX XIII. 
