106 PALLAS' S SEA EAGLE. 
Rapaces — DlURN^S. 
FALCONIDjE. 
Genus — Hali^eetus. (Savigny.J 
Genetic Characters. — Beak elongated, strong, straight at the base, curving 
in a regular arc in advance of the cere to the tip, forming a deep hook. 
Nostrils large, transverse and lunate. Fourth primary the longest. Tarsi 
half feathered, front of naked part scutellated, and the sides and back 
reticulated. Toes divided through; outer one changeable. Claws strong 
and hooked, grooved below; hind claw largest. 
PALLAS'S SEA EAGLE. 
Halia'etus leucoryphus. 
Halicce'tos leucoryphus, Keyserling et Blasius. 
" " Schlegel; Revue. 
" macei, Cuvier; Reg., An. 
Aquila leucorypha, Pallas; Zoog. Ross. Asiat., i, 
p. 352, No. 26. 
" deserticola, Eversmann. 
" leucoryphos, Gmelin. 
Falco macei, Temminck; pi. col. 8, 223. 
" leucoryphus, Bree; first ed. 
Cuncuma macei, Gray. 
Halia'etus unicolor, Gray. 
" lanceolatus, Gray. 
" Fulviventris, Vieillot. 
" albipes et lanceolatus, Hodgson. 
Specific Characters. — Tarsi naked and greyish white; cere livid. Plumage 
brown; vertex spotted with white. Nine large scales on the end of middle 
toe. — Pallas. 
Dimensions of an adult male in the Norwich Museum. — Length twenty-five 
inches; length of wing twenty-one inches; length of tarsus four inches; 
length of middle toe and claw three inches and a half. 
