PASSERES 



III. A certain arrangement of the wing-muscles is peculiar 

 to the majority of the Passeres, but not to all, and is not found in 

 other orders. The distal tendon of the tensor petagii brevis, a 

 muscle that runs parallel to the humerus, from the shoulder to 



Foot, from behind, of European Baven (Corvus corax), showing the Passerine 

 or schizopelmous arrangement of the deep plantar tendons, which cross without 

 being connected, and their separate action. (Dissected and drawn by H. 

 Gronvold.) 



a, flexor longus hallucis ; b, flexor perforans digitorum. 



its insertion into the fascia and muscles of the forearm, retains its 

 independence after its junction with the extensor metacarpi radialis 

 longus, and turns back to be inserted into the external condyle of 

 the humerus, close to the point of origin of the latter muscle. 



