towards the curved extremity, the edges irregularly jagged. Upper man-
dible with the dorsal line slightly concave, at the tip decurved, its ridge
broad and nearly flat at the base, narrowed and more convex towards the
end, the sides separated from the ridge by a narrow groove, convex, the
edges sharp and inflected, with a prominence at the commencement of the
curve of the elongated compressed hooked point. Nostrils basal, linear, in-
conspicuous. Lower mandible with the angle extremely long, narrow, the
membrane bare and dilatable into a small pouch, the very short dorsal line
decurved, the sides erect at the base, convex in the rest of their extent, the
edges sharp and much inflected, at the narrow tip decurved.
Head of moderate size, oblong. Neck of moderate length, stout. Body rather slender. Feet very short, stout; tibia very short; tarsus extremely short, feathered; toes all placed in the same plane, and connected by short reticulated webs with concave margins, but running narrow along the sides; they are scutellate above, broad and papillate beneath; first toe small, second shorter than fourth, third much longer than the latter. Claws strong, compressed, curved, acute, that of middle toe long, obliquely flattened, and pectinate on the inner edge.
Eyelids and gular sac, with the anterior part of the neck, bare. Plumage compact, on the head, neck, breast, and back, shining. The feathers of the head, neck, and back are lanceolate and acuminate; of the breast and sides broader; of the wings small and rounded. Wings extremely long, pointed, the first quill longest, the rest rapidly diminishing; the secondaries very short, obliquely rounded and acuminate, the inner long and tapering. Tail very long, deeply forked, of twelve rounded feathers, the outer narrow and abruptly rounded.
Bill light purplish-blue, white in the middle, the curved tips dusky. Inside of mouth carmine; gular sac orange. Bare space about the eye purplish-blue; iris deep brown. Feet light carmine above, orange beneath. The general colour of the plumage is brownish-black, the head, neck, back, breast, and sides, splendent with green and purple reflections, the former predominating on the head, the latter on the back. The wings are tinged with grey, the inner secondaries and tail with brown; the shafts of the former black, of the latter brown.
I have observed in specimens which I considered to be very old, that the gular sac was covered with pustules, similar to those found at times around the base of the mandibles of the Cathartes tflura, and which appear to be the effects of disease, occasioned by their coming frequently in contact with' putrid substances.
Length to end of tail 41 inches, to end of wings 37; to end of claws 24f; wing from flexure 25, tail 18; extent of wings 86; bill along the back 5^,
