There has been much controversy as to the way in which the Guillemot chicks reach the water from their lofty birthplace. Some writers assert that the parent bird carries them down to the sea on its back; on the other hand, Gätke maintains that the chicks tumble off the ledges into the water, being enticed to do so by the old birds swimming on the sea beneath the cliffs. He writes: “in its distress, the little chick tries to get as near as possible to the mother waiting for it below, and keeps tripping about on the outermost ledge of rock, often of no more than a finger’s breath, until it ends by slipping off, and, turning two or three somersaults, lands with a faint splash on the surface of the water; both parents at once take charge of it between them, and swim off with it towards the open sea. This is the only way in which I have seen this change of habitat of the young birds accomplished, during some fifty summers.” As soon as the young are sufficiently matured, the sea in the vicinity of the breeding-stations is deserted, and the colonies disperse far and wide. From this time forward, to the following breeding-season, the Guillemot’s movements are to a certain extent unknown. As Professor Newton justly asks,[4] What becomes of the millions of Guillemots and other Auks that breed in northern latitudes? The birds that are met with round the coasts of temperate Europe, and elsewhere, bear no proportion whatever to the mighty hosts whose position and movements remain unrevealed. At present the only feasible explanation seems to be that the birds, during the non-breeding-season, are scattered in quest of sustenance over many thousands of square miles of water; in summer only is their vast abundance palpable, when all are gathered into a comparatively small area. In connection with the Guillemot mention should be made of the Ringed Guillemot, the _Uria ringvia_ of Latham. It only differs from the Common Guillemot in having a narrow white band round the eye, which is prolonged into a streak for some distance behind and below it. It may be seen breeding in company with the commoner form, and is not known to differ in its habits. Whether it be a distinct species—as Gätke states—or merely a variety of the Common Guillemot, as many naturalists believe, still remains to be decided. BRUNNICH’S GUILLEMOT. This Guillemot, the _Uria bruennichi_ of Sabine and most modern writers, is a very rare visitor to the British Islands, its home being in the Arctic regions, from Greenland possibly to the Liakoff Islands, off the coasts of northern Siberia. It deserves a passing notice, for it is possible that it occurs in British waters more frequently than is generally supposed. It is a perceptibly stouter bird than the Common Guillemot, and has the base of the upper mandible pale gray. In its habits and economy it is not known to differ in any special manner from the better known species, of which it is the Arctic form.