In an adult male, the tongue is 1-1/4 inch long, slender, tapering, emarginate at the base, with minute papillæ, the tip horny along the back. The œsophagus is 6-1/2 inches long, 5 twelfths in diameter until it enters the thorax, then dilates to 1 inch and 5 twelfths; its walls are extremely thin, its inner coat longitudinally plaited. Proventriculus very short, the belt of oblong glandules being only 7 twelfths in breadth. Stomach rather small, oblong, 1-1/2 inch long, 10 twelfths broad; its lateral muscles rather thick, the tendons large; the inner coat thick, horny, and thrown into very prominent longitudinal rugæ, its upper margin abrupt, and manifestly not continuous with the inner coat of the proventriculus, as some have supposed the epithelium to be in all birds. In the stomach remains of fishes. Intestines 1 foot 9-1/2 inches long, its general diameter 1/4 inch. Rectum 1-1/2 inch; cœca extremely small, 2-1/2 twelfths long, 1/2 twelfth in diameter. Trachea 5-1/2 inches long; its rings 110, extremely thin and feeble; its diameter at the top 4-1/2 twelfths, at the lower part 2-1/2 twelfths. The lateral muscles are scarcely perceptible, the sterno-tracheal very slender; the inferior larynx small; the bronchi of moderate length and width, with 25 half-rings. KNOT OR ASH-COLOURED SANDPIPER. _TRINGA ISLANDICA_, LINN. PLATE CCCXV. ADULT IN SUMMER AND WINTER. The Knot, good Reader, is a handsome and interesting species, whether in its spring or in its winter plumage, and, provided it be young and fat, is always welcome to the palate of the connoisseur in dainties. As to its habits, however, during the breeding season, I am sorry to inform you that I know nothing at all, for in Labrador, whither I went to examine them, I did not find a single individual. I have been informed that several students of nature have visited its breeding places; but why they have given us no information on the subject, seeing that not only you and I, but many persons besides, would be glad to hear about it, is what we cannot account for. I do not wish you to infer from these remarks, that the persons alluded to are the only ones who have neglected to note down on the spot observations which might be interesting and useful. I myself am very conscious of my own remissness in this respect, and deeply regret the many opportunities of studying nature which have been in a manner lost to me, on account of a temporary supineness which has seized upon me, at the very moment when the objects of my pursuit were placed within my reach by that bountiful Being to whom we owe all our earthly enjoyments, and all our hopes of that future happiness which we strive to merit.