and white above the tail, gives them a good deal the appearance of our House-Martin. I went to bed and watched them in their noiseless flight long ere I fell asleep, but in the morning they had disappeared; one had fortunately made its escape through a broken pane in the window which a towel should have occupied, the other had fallen into a basin, full of the yolks of eggs which I had been blowing, and was drowned. I regretted much the fate of a being so interesting, by its very remarkable, wandering, solitary, and harmless life. Before leaving Shetland I again visited the island of Oxna, and though so late as the 30th of June, they were only just beginning to lay their eggs. In Foula they breed in the holes in the cliff, at a great height above the sea; but here under stones which form the beach, at a depth of three or four feet, or more, according to that of the stones; as they go down to the earth, beneath them, on which to lay their eggs. In walking over the surface, I could hear them, very distinctly, singing in a sort of warbling chatter, a good deal like swallows when fluttering above our chimneys, but harsher; and in this way, by listening attentively, was guided to their retreat, and, after throwing out stones as large as I could lift on all sides of me, seldom failed in capturing two or three seated on their nests, either under the lowest stone or between two of them. The nests, though of much the same materials as the ground on which they were placed, seem to have been made with care; they were of small bits of stalks of plants, and pieces of hard dry earth. Like the rest of the genus, the Stormy Petrel lays invariably one egg only. During the day-time they remain within their holes; and though the fishermen are constantly passing over their heads (the beach under which they breed being appropriated for the drying of fish), they are then seldom heard, but toward night become extremely querulous; and when most other birds are gone to rest, issue forth in great numbers, spreading themselves far over the surface of the sea. The fishermen then meet them very numerously; and though they have not previously seen one, are sure to be surrounded by them upon throwing pieces of fish overboard.” The egg measures one inch and an eighth in length, six and a half eighths in breadth, is nearly equally rounded at both ends, rather thick-shelled, and pure white, but generally with numerous minute dots of dull red at the larger end, sometimes forming a circular band. PROCELLARIA PELAGICA, _Linn._ Syst. Nat. vol. i. p. 212.—_Lath._ Ind. Ornith. vol. ii. p. 826. STORMY PETREL, _Nuttall_, Manual, vol. ii. p. 327. Adult Male. Plate CCCXL. Fig. 1.