PROCELLARIA MACROPTERA.— Smith. 
Aves. — Plate LII. 
P. obscure rubro-brunnea ; rostro nigro ; pedibus brunncis. 
Longitcdo ab apice rostri ad basin caudae 1 1 unc. 6 lin. ; caudae 6 unc. 
Colour. — The whole plumage intermediate between brownish red and 
liver-brown ; several of the scapulars and interscapulars narrowly tipped with 
yellowish brown. The feathers of the head, neck, and body silvery white 
towards their base, with a satin lustre. Bill rich black. Tarsi, toes, and 
interdigital membranes liver-brown, the two first tinted with lake-red. 
Form, &c. — Figure moderately stout, and not quite so rounded as that of 
the last species. Head of moderate size, and slightly tapering towards the 
vertex ; bill robust, and strongly compressed, particularly towards the point, 
the sides of the upper mandible slightly convex, and distinctly separated on 
each side from the culmen, by a deep longitudinal groove, which commences 
at the anterior extremity of the nasal tube, and terminates at the commissure 
about opposite to the point where the edge of the lower mandible begins to curve 
downwards. The hook of the upper mandible forms fully half the length of 
the bill, its base being within a small distance of the termination of the nasal 
tube ; it is much curved, and its point descends considerably below the lower 
mandible ; posteriorly its upper edge projects above the level of the nasal 
tube ; the latter is rounded superiorly, or somewhat bluntly carinated, and 
anteriorly presents only a single opening. The lower mandible is marked on 
each side with a distinct longitudinal groove, which commences at its base, 
and terminates where the cutting edge begins to curve downwards ; the 
point of the mandible is acute, and slightly prolonged. Tarsi moderately 
robust, and covered with small, flat, irregular shaped scales ; toes rather slen- 
der; interdigital membraneslarge, and their anterior edges superiorly delicately 
plaited. Claws slightly curved and pointed ; a slender somewhat cylindrical 
claw in the place of the hinder toe. Wings long, and exceed by an inch and 
