KKV TO FAMILIES. WATER HIliDS. 



21 



GROUP 5. 

 Toes, three, full webbed ; no hind toe. 



Nostrils, separate, not opening into one double-barrelled tube; upper mandible, curved 

 near tip; bill, yellowish, or greenish yellow; an indication of a hind toe, in the form of a 



small knob without nail; tail, entirely white, or 

 white with black baud near tip. This is the only 

 North American gull lacking a hind toe. 



Family LARID/E (Lartia tridactyla}. 

 Kittiwake Gull. 

 See page 30. 



Bill, reddish (in life showing also yellow and blue), 

 peculiar in form, suggesting that of parrot. 

 Family ALCID/E. 

 Subfamily FRATERCULIN/E, Puffins. 



See page 30. 



Bill, black, with narrow white band. 

 Family ALCID/E. 

 Subfamily ALCIN/E. Auks. 



See page 30. 



Bill, black or brownish; wing, 

 over 7.25 inches long, carpus (bend 

 of wing) to tip. 



Family ALCID/E. 

 Subfamily ALCIN/E. 

 Murres. 

 See page 30. 



n 



' 



Bill, black, or blackish; wing, less than 7.25, but more than 5.50, measured, carpus to tip. 



Family ALCID/E. Subfamily PHALARIN/E. Guillemots. 



See page 30. 



