Feet and Legs 55 
these, as exact divisions, have long since been abandoned, 
yet it is worthy of note that even in the most modern 
classifications many of these groups hold good in the 
main, although based on other and more fundamental 
Fic. 284.—Foot of Brown Pelican. 
characters. Examples of these are the ostrich-like birds, 
or runners; the fowl-like birds, or scratchers; and the 
Passeres, or perching birds. But there is no doubt that 
several unrelated groups have independently acquired the 
