302 , 
ON THE CLASSIFICATION OP BtllDS. 
SnsrAM. PLYCTOLOPHINjE. Cockatoos. 
Head large, ornamented with 
a folding or procumbent 
crest. Bill short, very broad ; 
the culmen remarkably curv- 
ed. Tail rounded, length- 
ened, broad; the feathers not 
narrowed. 
Plyctolophus, Vieil. Head 
with a folding crest. Base 
of the under mandible 
{fig. 272. V) frequently 
concealed by feathers, 
which then makes it 
appear higher than it is 
* long {a a). Wings long ; secondaries, tertials, and 
sometimes the tail feathers, mucronate. India, Aus- 
tralia. Subtypical. 
P. erythropterus. Lear. pi. 5. 
galcritus. Ib. 3. 
sulphureus. lb. 4. 
galeatus. Latli. G. II. pi. 28. 
rosaceus. Lear. pi. 2. 
Cookii. Kuhl. pi. S. 
Banks!!. White’s Voy. 
Solandri. Lin. Tr. xiii. 1 13. 
funeralis. Shaw. N. If. 186. 
? Baudinii. Lear. pi. 6. 
Licmbtis, Wagler. General structure of Pbjctolnphus, 
with the bill of Leptorynchus.* The tenuirostral 
type. 
L. tenuirostris. Kuhl. PI. Col. 
MiciiOGtossits, Geoffrey St. Hilaire. Cheeks naked. 
Head large. Crest of narrow procumbent feathers. 
Bill very large ; the upper mandible enormous, doubly 
sinuated, and prolonged into an acute hook ; the 
lower very short, but of great depth : the culmen 
almost perpendicular. Tail short, even. Tongue re- 
tractile, small, cylindrical, terminated by a thickened 
gland. India. Typical. 
M. aterriinus. Le Vail. pi. 12, 13. griseus. Le Vail. pi. 1 !. 
* Not having: a specimen of this bird before me, I merely indicate Uie 
typical characters. 
