VERTEBRATA. 



339 



hind in a ridge. The toes, always three in front and 

 one behind, are on the same level. The eggs are usu- 



Fio. 327 Kingfisher (Ceryle). 



ally colored. Here belong the Ravens, Crows, Jays, Birds- 

 of- Paradise, Blackbirds, Orioles, Larks, Sparrows, Tan- 



FIG. 3-_>S. S\valk,w (Hirundo). 



