_Bill_ longer than the head, dilated and rugose at tip: _tip_ slightly curved downwards, and with a dorsal groove: _nasal groove_ elongated; _feet_ long, an extensive naked space above the knee; _toes_ slightly margined, a membrane connecting the basal joints of the exterior toes; first of the primaries rather longest. _Genus Pelidna_, CUV. 1. _Pelidna pectoralis._--_Bill_ black, reddish-yellow at base; upper mandible with a few indented punctures near the tip; _head_ above black, plumage margined with ferruginous, a distinct brown line from the eye to the upper mandible; _cheeks_ and _neck_ beneath cinereous very slightly tinged with rufous, and lineate with blackish; _orbits_ and line over the eye white; _chin_ white; _neck_ above dusky, plumage margined with cinereous, _scapulars_, _interscapulars_, and _wing coverts_ black, margined with ferruginous, and near the exterior tips with whitish; _primaries_ dusky, slightly edged with whitish, outer quill shaft white; _back_, (beneath the interscapulars, _rump_) and _tail coverts_ black, immaculate; _tail feathers_ dusky, margined with white at tip, two intermediate ones longest, acute, attaining the tip of the wings, black, edged with ferruginous: _breast_, _venter_, _vent_ and _inferior tail coverts_ white, plumage blackish at base; _sides_ white, the plumage towards the tail slightly lineate with dusky; _feet_ greenish-yellow; _toes_ divided to the base. Length nearly 9 inches. Bill 1-1/8 inches. This bird in many respects resembles _cinclus_, but as the average size of that bird is stated at seven inches and one or two lines, ours is doubtless a distinct species. Many flocks of them were seen at Engineer Cantonment, both in the spring and autumn, the individuals of which corresponded in point of magnitude: we add a description for the information of ornithologists. It is described from a specimen in the autumnal plumage. In the spring dress, the colour of the superior part of the bird is much paler, almost destitute of black, and the feathers are brownish, margined with pale cinereous; the superior part of the head is always darker than any part of the neck, and margined with ferruginous; the plumage of the neck beneath, and the breast, does not appear to be subject to so much change, as that of the superior part of the body.