. The descent of man, and selection in relation to sex. Evolution; Heredity; Human beings; Natural selection. 460 THE DESCEirr OF MAN. [PART II. ^^^ SS-ai^Stti i followed in the process of confluence and modification; and the black ring which surrounds the ball of the ocellus is un- questionably formed by the union and modification of the three black marks, b, c, dy of the elliptic oriia- ment. The irregular zig-zag black marks between the successive orclli (see again fig. 57) are plainly due to the breaking up of the some- what more regular but similar marks between the elliptic ornaments. Th
. The descent of man, and selection in relation to sex. Evolution; Heredity; Human beings; Natural selection. 460 THE DESCEirr OF MAN. [PART II. ^^^ SS-ai^Stti i followed in the process of confluence and modification; and the black ring which surrounds the ball of the ocellus is un- questionably formed by the union and modification of the three black marks, b, c, dy of the elliptic oriia- ment. The irregular zig-zag black marks between the successive orclli (see again fig. 57) are plainly due to the breaking up of the some- what more regular but similar marks between the elliptic ornaments. The successive steps in the shad- ing of the ball-and-socket ocelli can be followed out with equal clearness. The brown, orange and pale leaden narrow zones, which border the lower black mark of the elliptic ornament, can be seen gradually to become more and more softened and shaded into each other, with the upper, lighter part toward the left-hand co»-ner ren- dered still lighter, so as to become almost white, and at the same time more contracted. But even in the most perfect ball- and-socket ocelli a slight difference in the tints, though not in the shading, between the Ui)per and lower parts of the ball can be perceived, as before noticed; and the line of sepaiation is oblique, in the same direction as the bright-colored shades of the elliptic ornaments. Thus almost every minute delail in the shape and coloring of the ball-and-socket ocelli can be shown to follow from gradual changes in the elliptic ornaments ; and the development of the latter can be traced by equally smah steps from the union of two almost simple spots, the lower one (fig. 58) having some dull fulvous shading on its upper side. The extremities of the longer secondary feathers, which bear the perfect ball-and-socket ocelli, are peculiarly ornamented (fig. 61). The oblique longitudinal stripes suddenly cease upward and become confused ; and above this limit the whole upper end of the feather (^) is covered wi
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Keywords: ., bookcentury1800, bookdecade1870, booksubjecthumanbeings, bookyear
