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"Fig. - 20 - Two barbs, a, a, of a vane, bearing anterior, b, b, and posterior, c, barbules; enlarged; after Nitzsch." Elliot Coues, 1884

Structure of a Feather

"Fig. - 20 - Two barbs, a, a, of a vane, bearing anterior, b, b, and posterior, c, barbules; enlarged;…

"Fig. 19 - A partly pennaceous, partly plumulaceous feather, from Argus pheasant; after Nitzsch. ad, main stem; d, calamus; a, rhachis; c, c, c, vanes, cut away on left side in order not to interfere with b, the after-shaft, the whole of the right vane of which is likewise cut away." Elliot Coues, 1884

Feather from a Argus Pheasant

"Fig. 19 - A partly pennaceous, partly plumulaceous feather, from Argus pheasant; after Nitzsch. ad,…