190 KITTIWAKE GULL. 



along the edge of lower mandible 9,-^^ ; tarsus 1^''^ ; middle toe 1^, its 

 claw /j. Weight 1^ lb. 



Young bird in January. Plate CCXXIV. Fig. 2. 



Bill and feet black. Edges of eyelids and iris as in the adult. The 

 hind head and neck are bluish-grey, and before the eye there is a semi- 

 lunar blackish mark, the tips of the auriculars also dark grey. Forehead, 

 sides of the head, throat, and lower parts, white, as is the rump. Tail 

 white, with a broad terminal band of black, the outer feather having only 

 a spot on the inner web. The mantle is bluish-grey, but a broad band 

 of black crosses the lower part of the hind neck, and the larger wing- 

 coverts are of the same colour towards the end. The primary quills are 

 black, more or less margined with white internally. 



Length to end of tail 17 inches, to end of wings 19, to end of claws 17 ; 

 extent of wings 36/^. Weight 14^ oz. 



