Genus— X ENORHYNCHUS. 
Xenorhynchus Bonaparte, Gonsp. Gen. Av., Vol. II., 
p. 106, 1855 . . . . . . . . . . . . Type X. asiaticus. 
Giconitne birds with very long bills, long necks and wings, short tail, very 
long legs, and long exposed tibia, with small feet. 
The culmen is very long, straight, the upper mandibular ridge scarcely 
upturned. The biU is very compressed laterally and strongly keeled ; the 
under mandible is distinctly upcurved, no gonydeal angle being present, 
but a long upward sloping curve is observed instead. 
The nostrils are linear slits placed near the base of the culmen in 
the upper half of the mandible; no groove is present, but a ridge runs 
from the upper edge of the nostril along the mandible, becoming obsolete 
about two-thirds the length of the culmen. No grooving occurs on the 
sides of the lower mandible. 
The head is fully feathered ; no crest developed. The wing is long 
and has the third primary longest ; the second and fourth are sub equal ; 
the first shorter than the fifth. It is about twice the length of the culmen, 
which is equal to the metatarsus and longer than the tail. 
The tail is short and slightly rounded, composed of twelve feathers ; 
the under tail-coverts equal in length. The legs and exposed tibia are 
very long ; the metatarsus is very long, and covered with hexagonal scales. 
The toes are comparatively very short, being less than one-third the 
length of the metatarsus ; a small connecting web is present, as is also 
a hind toe. 
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