CHORDA I \ 





trunk when not in use. The body when the bird is running 

 land or standing is supported entirely by the two posterior 

 appendages, which terminate as a rule in four toes tipped with 

 claws (Fig. 329). 



FIG. 320. Various forms of birds' feet, a, Cypselus apus, pes adhamans; b, J 

 pes scansorius; c, Phasianus colchicus, pes ambulalorius ; d, Turdus torquatus, pi 

 e, Alcedo tspida, pes gressorius : /, Falco biarmicus, pes insii lens ; g, I 



colligatus; h, Struthio camelus, pes cursorius; i, Mergus me 

 6, Recurvirostra avocetta, pes semi-palmatus ; /, Podiceps cristatus, 

 m, Fulica atra, pes lobatus ; n, Phaeton athereus, mus. (From Clans and s 



wick's Text-book.) 



There are several kinds of feathers found on birds, the two 

 most important being the stiff contour feathers which give th 

 general shape to the body, and the softer plume, or down, 



