102 STRUCTURE AND CLASSIFICATION OF BIRDS 



the others being supplied by trifurcate flexor hallucis 

 (fig. 58). 



(7) Both tendons present, but no vinculum at all in 

 Passeres (fig. 59). 



Of these seven types there are naturally modifications 

 and intermediate conditions, which will be described in the 

 systematic part below. 



Short Flexors. Of these there are two series ; one set 



IV 



ITT 



FIG. 58. Mcgalcsma (AFTEK 

 GAHBOD). 



FIG. 59. A PASSEIUNE FOOT 

 (AFTEK GAKKOU). 



arises from the bones of the metatarsus, the others from the 

 long tendons. We shall commence with the first set. 



The flexor hallucis brevis is often (Palamedea, Aceros) 

 composed of two distinct muscles with separate tendons 

 and insertions on to the first digit. 



Flexor (adductor) dirjiti II. is inserted on to the median 

 side of the base of first phalanx of digit II. 



Flexor (adductor) digiti IV. arises near to the last, and 

 has a similar relation to the basal phalanx of digit IV. 



