122 Transactions.—Zoology. 
that it would turn out to be an accidental variety of the common species. 
An examination of the type specimen satisfied me at once that it was a good 
species, very readily distinguishable from Р. nove-zealandie by its more 
robust form and more powerful mandibles, independently of its uniform green 
colour, : 
The accompanying sketch of the heads of the two species (natural size) will 
sufficiently confirm what I have said. 
Fie. 1.—Р. novee-zealandie. Fic. 2.—P. unicolor. 
Mr. G. R. Gray included this species in his List of the Birds of New 
Zealand (“ Ibis," 1862), and on this authority, although rejected by me in the 
“Essay” (Trans. N.Z. Inst, Vol. L, 1868), it has been retained on most of 
the subsequent lists. 
As the original description by Vigors* is not very accessible, and as the 
account of the bird in Dr. Finsch's excellent Monograph (“ 
р. 289) does not appear to bring out the distinctive charact 
with P. nove-zealandie, with sufficient clearness, 
species as follows :— 
Die Papageien," 
ers, as compared 
I venture to characterize the 
PLATYCERCUS UNICOLOR, Vig. 
Diag.—Omnino prasinus, vertice capitisque lateribus lztioribus: dorso et 
* Proc. Zool. Soc., 1831, p. 24, 
