THE FULMAR PETREL. 117 earth, where they hide themselves while hatching, and never come to land at any other time. The Petrel lays one large egg, and will fight in defence of its young. The Fulmar Petrel is one of the largest of these birds, being sometimes seventeen inches in length. The upper plumage is of a bluish-ash color, the lower is pure white. The feathers are close and full, and have a fine down beneath. The Ful- mar is sometimes seen on the coast of the United States, but these occasions are very rare.