622 DUSKY PETREL. 



rather stout, reticulate ; hind toe a very slight knob, with a small conical 

 claw ; fore toes long, slender, connected by reticulated webs with concave 

 margins, the outer toe slightly longer than the third. Claws small, slightly 

 arched, compressed obtuse. 



Plumage soft, full ; the feathers rounded, those of the back and wings 

 rather compact. Wings long ; primaries tapering, rounded, the first 

 longest, the rest rapidly graduated ; secondaries of moderate length, 

 rounded. Tail rather short, much rounded, of twelve feathers. 



Bill light blue, the tips black, mouth light blue. Edges of eyelids light 

 blue, iris bluish-black. Outside of tarsus and toes indigo-black, inside and 

 webs pale yellowish-flesh-colour ; claws bluish-black. The upper parts are 

 sooty black, the lower pure white. 



Length to end of tail 11 inches, to end of wings 10|, to end of claws 

 11^ ; extent of wings 26^ ; bill along the back Ij^, along the edge of 

 lower mandible If ; tarsus I5 ; outer toe 3, its claw j^|. 



