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OF THE KAGU, SUN-BITTERN, AND BOATBILL. 469 
of the feathers of which, chiefly the posterior, are as much as 7 or 8 inches in length, 
the front ones, however, being much shorter. ‘These have each an accessory plume 
(hyporhachis), which is downy in character. The vane of the main feather, for its 
Fig. 2. 
2. Back crest-feather; and 3. Inside view of an upper 
wing-covert, of the Kagu. Both of natural dimensions. 
lower two-thirds or more, according to the length of the feather, is composed of 
delicate barbs, which have an abundance of soft downy barbules, excepting at the tip, 
