376 PELECANINtE. 



groove on each side, the sides convex, the edges sharp, the 

 unguis decurved, acute ; lower mandible with the angle long, 

 filled by a bare extensile membrane, the sides convex, the 

 edges sliarp and inflexed, the tip compressed, with its upper 

 outline decurved. Nostrils obliterated. Feet stout; tarsus 

 very short, strong, covered all round with angular scales ; 

 toes all in the same plane, and connected by webs, the fourth 

 longest ; claws strong, arched, compressed, that of the third 

 pectinate. Plumage soft ; wings of moderate size, broad, the 

 second quill longest ; tail of moderate length, very narrow, 

 much rounded. 



1. Phalacrocorax Carlo. Great Cormorant. Tail of 

 fourteen feathers ; a small longitudinal occipital crest in 

 summer ; throat, and a patch over each thigh white. 



2. Phalacrocorax Graculus. Green Cormorant. Tail of 

 twelve feathers ; a crest of oblong, erect, incurvate feathers ; 

 plumage blackish-green \ feathers of the back ovate, with 

 velvety margins. 



GENUS II. SULA. GANNET. 



Bill longer than the head, stout, conical, straight, mode- 

 rately compressed toward the end ; upper mandible with the 

 ridge broadly convex, with a narrow groove on each side, the 

 sides erect, the edges sharp and serrate, the tip a little 

 deflexed ; lower mandible with the angle long, filled by a 

 bare membrane, the edges sharp and serrate, the tip com- 

 pressed. Nostrils obliterated. Feet stout; tarsus very short, 

 strong, sharp behind, reticulated, but having narrow lines of 

 scutella continuous with the toes ; which are all in the same 

 plane, and webbed, the thijd longest ; claws arched, com- 

 pressed, that of the third toe pectinate. Wings long, rather 

 narrow, pointed ; tail rather long, graduated. 



1. Sula Bassana. Common Gannet. Bill bluish-grey; 

 bare parts on the head blackish-blue ; plumage white ; head 

 and neck tinged with reddish-yellow ; primary quills dusky. 



