188 
LA RIDE. 
alternately, and feed the young -with what they furnish out 
of the tubular appendage upon the upper mandible, like the 
foregoing species ; and they are so much attached to their 
offspring, that they will allow themselves to be taken out of 
their hole without attempting to take wing. 
The present species measures fourteen inches in length ; 
the beak one inch six lines from the forehead to the tip ; 
the tarsi one inch nine lines; the wing nine inches six 
lines. 
The adult male has the upper plumage, from the base of 
the upper mandible to the extremity of the tail, dusky black, 
with a slight tinge of grey; the feathers being of a glossy 
texture ; the sides of the neck transversely barred with grey; 
the thighs spotted with the colour of the upper plumage, 
intermixed with grey, the under parts are pure white, the 
beak is brown at its base, and black towards, and including 
the tip ; the legs and feet are brown on the hinder part, 
and the outer toe; the front and sides of the tarsi and 
toes, flesh colour; the webs rayed with brown, the eyes 
dark brown. 
The young of the year have the under parts ash-colour; 
the upper plumage light sooty brown, which plumage be¬ 
comes irregularly spotted with dusky black in the intermediate 
moult, which takes place between the immature and mature 
plumage. 
The egg figured 818 is that of the Manx Petrel. 
