168 VISCOUNT WALDEN ON THE BIRDS 
To the flattened side of the maxilla is attached a plate which extends from the base 
for two thirds of the length of the maxilla. In the thickness of this plate are six 
narrow and shallow, almost perpendicular, grooves, coloured yellow in the dried 
specimen. A similar plate has grown on the sides of the mandible, and is grooved by 
narrower and more deeply cut diagonal channels. A narrow casque springs from the 
forehead, which, somewhat swollen posteriorly, is compressed anteriorly into a blunt 
broken edge. ‘The commissure is much indented and broken. This description of the 
bill applies to the adults of both sexes; but in the male the bill is longer and 
deeper than in the female. 
Longitudo 
rostr.! alee. caude, 
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69, * PENELOPIDES MANILL&. 
Calao de Manille, D’ Aubenton, Pl. Enl. 891, ¢ juv. 
Le Calao de Manille, Buffon, Hist. Nat. vii. p. 144, go juv. p. 140, no. 9. 
Buceros manille, Bodd. Tabl. Pl. Enl. p. 54, ex D’Aubent. (1783). 
Buceros manillensis, Gm. S. N. i. p. 361, no. 10, ex Buffon (1788). 
Le Calao & bec cizelé, dans son jeune dge, ue Vaillant, Ois. Rares, i. p. 37, pl. 18, ¢ jun. 
Buceros sulcirostris (juv. viril.), Wagler, Syst. Av. p. 201, ex D’Aubenton. 
Buceros manillensis, Buffon, Meyen, Noy. Act. Ac. C. L. C. Nat. Cur. xvi. Suppl. prim. p. 91, pl. 
xi. d adult. 
Buceros manillensis, Linn., v. Kittlitz, Lutké, Voy. (Postels) iii. p. 326, ‘ Manilla.”’ 
Buceros panayensis, Scop., Schlegel, Mus. Pays-Bas, Buceros, p. 11, nee Scopoli. 
Buceros panini, Bodd., y. Martens, J. f. O. 1866, p. 18, nec Bodd. 
Hab. Luzon, January and February (Meyer). 
The adult male (nos. 1, 2) has the back, rump, upper tail-coverts, and wings dull brown, 
with a bronze-green gloss. ‘The primaries are brown, with a faint ferruginous fringe to 
the outer webs, the secondaries with a bolder albescent edging. ‘The head, neck, throat, 
breast, abdomen, vent, thigh-coverts, and under tail-coverts, tawny. The throat, cheeks, 
and ear-coverts black, and marked as in P. panini. The crest is more elongated than 
in that species. The rectrices for the first five inches are bronzed brown, followed by a 
ferruginous band about one inch deep, and terminated by a black band glossed with 
green of about two inches. A narrow ferruginous fringe terminates some of the rec- 
trices. In the outer pair, and sometimes in the two outer pairs, the ferruginous band 
is pale tawny, and does not run through the outer webs. 
The adult female (no. 3) has the wings, back, and tail as in the male, the rest of the 
‘ Measured in a straight line from the nostril to the tip, 
