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Rh therefore, over the whole under surface. Moreover, from each eye to the base of the bill, on the corresponding side, there is a thick black line. The wings, which I have seen it flap, are small, with the quills not sufficiently developed for flight—at least, I should think not. Some time after this I saw a smaller chick which had been hidden hitherto behind the two parents. The non-locomotion of both was as marked a feature as ever—for this struck me very much the last time I was here. The smaller one I could never make out again. The other was for a long time invisible behind its slight escarpment, and then, though it came out and was active where it stood, it did not move more than an inch or so beyond it, or in any direction.

As this chick evidently could not fly, it, as evidently, could not have left the ledge, and returned to it. Imagine, therefore, that the chicks are conveyed down by the parents, in this state, as it is asserted that they are, and the emptiness of the ledges, of young birds, is explained; for by the time they could fly they would have forgotten all about them, even if they were not far away, as they probably by that time would be. But if they wait till they can fly before leaving the ledges, why do they not fly back to them, and then backwards and forwards, like the young kittiwakes, or the young shags? Why do they not accompany their parents when they return, since their parents will not stay with them upon the sea? All this is explained upon the supposition that the parent guillemot