Archive image from page 505 of The descent of man, and. The descent of man, and selection in relation to sex descentofmansele1874darw Year: 1874 Fig. 55. Part of a tail-covert of Poly- plectron chinquis, with the two ocelli of natural size. Fig:. 56. Part of a tale-covert of Poly- pleotron malaccense, with the two ocelli, partially confluent, of nat- ural size. tail-feathers of Polyplectron, which in most of the species are ornamented with larger ocelli than those on the tail- coverts. Hence I was led carefully to examine the tail- feathers of the several species, in order to discover whether
Archive image from page 505 of The descent of man, and. The descent of man, and selection in relation to sex descentofmansele1874darw Year: 1874 Fig. 55. Part of a tail-covert of Poly- plectron chinquis, with the two ocelli of natural size. Fig:. 56. Part of a tale-covert of Poly- pleotron malaccense, with the two ocelli, partially confluent, of nat- ural size. tail-feathers of Polyplectron, which in most of the species are ornamented with larger ocelli than those on the tail- coverts. Hence I was led carefully to examine the tail- feathers of the several species, in order to discover whether their ocelli showed any tendency to disappear; and to my great satisfaction this appeared to be so. The central tail- feathers of P. napoleonis have the two ocelli on each side of the shaft perfectly developed; but the inner ocellus be- comes less and less conspicuous on the more exterior tail- feathers, until a mere shadow or rudiment is left on the inner side of th outermost feather. Again, in P. malac-
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