SEMIPALMATED RING PLOVER, _Nuttall_, Manual, vol. ii. p. 24. Adult Male. Plate CCCXXX. Fig. 1. Bill shorter than the head, straight, somewhat cylindrical. Upper mandible with the dorsal line straight for half its length, then bulging a little and curving to the tip, which is rather acute, the sides sloping at the base, convex towards the end, where the edges are sharp and direct. Nasal groove extended along more than half of the mandible; nostrils basal, linear, in the lower part of the membrane, open, and pervious. Lower mandible with the angle short, narrow, but rounded, the sides at the base sloping outwards and flat, the dorsal line ascending and slightly convex, the edges sharp and involute towards the tip. Head of moderate size, oblong, rather compressed, the forehead rounded. Eyes large. Neck rather short. Body ovate, compact. Wings long. Feet slender, of moderate length; tibia bare a considerable way above the joint; tarsus of moderate length, rather compressed, covered all round with sub-hexagonal scales; toes slender; the hind toe wanting; third or middle toe much longer than the outer, which exceeds the inner; all with numerous scutella; the outer connected with the middle toe by a web which extends to the second joint of the former, and runs along the edge of the latter, forming a broad margin, the outer toe also connected with the middle toe by a short membrane which does not extend more than half-way to the second joint. Claws small, slightly arched, compressed, rather blunt, that of the middle toe having the inner edge dilated. Plumage soft and blended; the feathers rounded, those of the back somewhat distinct. Wings long and pointed; primary quills tapering, the first longest, the second a little shorter, the rest rapidly graduated; outer secondaries incurved and obliquely emarginate; the inner tapering and elongated, one of them reaching to half an inch from the tip of the longest primary. Tail of moderate length, considerably rounded, of twelve feathers.