102 



STEUOTURE AND CLASSn^ICATlON 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 

 s 



Fig. 58. — Megalcsma (aftek 

 Garbod). 



Fig. 59. — A Passeeine Foot 

 (after Gaebod). 



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

 long tendons. We shall commence with the first set. 



Th-e fleosor hallucis- brevis is often {Palamedea, Aceros) 

 composed of two distinct muscles with separate tendons 

 and insertions oA to the first digit. 



Flexor {adductor) digiti II. is inserted on to the median 

 side of the baise 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. 



