592 



AVES. 



Genus 15.— C AK^O.— Meyer. 



Generic Character. — Bill of medium length, long in some species, straight, 

 robust, compressed, and rounded at the top ; upper mandible slightly re- 

 trousse, and grooved, greatly liooked at the point ; lower mandible com- 

 pressed and sub-truncated ; base of the bill invested by a membrane, extend- 

 ing a little way down the throat, which with the face is naked; nostrils 

 biisal, linear, oblique, and involved in the membrane; legs strong, short; 

 three anterior toes and hallux, connected by the membrane, and webbed to 

 their points ; middle claw serrated; wings of medium length, the second 

 and third quills longest. 



Carbo cormoranus.—'ih.e Cormorant. Plate xlvii. fig. 8. Described, vol. 

 iii. p. 373. 



Carbo graculus.—T\ie Shag. Plate xlviii. fig. 2. Described, vol. iii. p. 376. 



Gen«s 17.— TACHYPETES.— r/eiV/o^. 



Generic Character. — Bill longer than the head, strong, entire, with a su- 

 ture close by the ridge ; both mandibles bent downwards, greatly hookedj 

 lower mandible compressed, upper mandible with a notch near its tip ; nostrils 

 basal, linear, elongated, situated in the groove ; legs strong and short ; tar- 

 sus half covered by feathers, placed far back ; feet with three short anterior 

 t'les, connected to the first joint by a membrane ; hallux placed on the side, 

 of medium length, and connected with the toes by a small membrane; the 

 wings very long, first and second quills the longest ; tail long and forked. 



Tachypetes aquilus. — The Frigate Bird. Plate xxxix"*. fig. 8. Described, 

 voi. iii. p. 376. 



Genus 18. — SULA. — Brisson. 



Generic Character. — Bill much longer than the head, strong, very broad 

 at the base, and tapering to the point in the form of a cone, compressed to- 

 wards the tip, which is obliquely curved ; gape very wide, extending behind 

 the eyes ; under mandible slightly inflated near the point ; the edges of both 

 mandibles serrated ; face and throat naked ; nostrils basal, linear, situated 

 in the ridge and concealed by a membrane ; legs short, strong, placed far 

 behind ; tarsus covered with feathers at top ; three anterior tois, and hallux 

 connected by a web, the latter hmg, articulated on the side of the tarsus ; 

 claw of the middle toe serrated ; wings long, first and second quills long- 

 tttt. 



Sulaalba. — The Soland Goose. Plate xlv in. fig. 1. Described, voL iii. p. 

 379. 



Genus 19.— PLOTUS.— Linn<SMs. 



Generic Character. — Bill long, quite straight, slender, fusiform, and sharp 

 pointed ; edges of upper mandible dilated at the base, compressed, and in- 

 flected on the other parts ; under mandible inflated near the point, and 

 slightly retrousse at the t\\> ; edges of buth mandibles finely serrated ; face 

 and throat naked ; nostrils basal, linear, oblong, ovate, situated in the groove 

 and concealed ; legs short, strong, tarsus partly covered with feathers at the 

 top ; feet with three anterior toes, and the hallux articulated at the side of 

 the tarsus, the whole connected by one web to their points ; nal'.s strong. 



