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60 cleanly and finely divided that they look as though they had been traced by a paint-brush in the hand of a Japanese artist. There is a gorget of rich ruddy chestnut on the throat, but the rest of it, with the head and chin, is of a very delicious plum-bloomy grey, which looks in the sunlight as though it would be purple if it dared, but were too modest—a lovely and æsthetic combination, soft, yet bright, and the whole with such a smoothness as no words can describe. There is another effect wrought by the sun, if it should happen to be shining, and if the bird should be swimming so as to give a profile view. It then looks as though there were a broad, white stripe—white, but having almost a prismatic brilliancy—along the contour-line of the nape. This appearance is most deceptive, and it is only when the bird turns its neck so as to show the several thin delicate stripings that one sees it to be illusory. It is produced, I think, by the light being reflected from the white stripes alone, so that the black ones between them are overlooked. Whatever may be the cause, the effect is most striking and lovely, and if the stripes themselves are due to sexual selection—which I do not doubt they are—this far more beautiful appearance, being the effect and crown of them, must assuredly also be. Here is a neck, then! and I have seen three, and once even seven, together!

In their way of diving, again, these birds resemble the grebes. Sometimes they go down with a very quiet little leap, but often they sink and disappear so