io8 The Alligator and Its Allies 



'is 



dylus externus humeri and is inserted on the outer 

 side of the entire length of the radius. 



Tliimcro-radialis Brevis (Plate II., Fig. 4, d) 

 (Supinator brevis, Kurze Riickwartswender, Ex- 

 tensor carpi-radialis brevis [?]). Arises near the 

 preceding from the external condyle of the humerus 

 and is inserted at the upper end of the radius. 



Humero-carpi-radialis (Plate II., Fig. 2, a) 

 (Aeusserer oder langer Speichenmuskel, Musculus 

 quern parti superiori extensoris digitorum com- 

 munis respondere videbat, Extensor carpi-radialis 

 longus, Abductor pollicis longus). Towards the 

 ulna, near the supinator longus muscle. It springs 

 from the external condyle of the humerus, covers 

 the supinator brevis muscle, and is inserted on the 

 proximal end of the carpi-radialis. 



Humero-carpi-ulnaris (Plate II., Fig. 2, c) 

 (Extensor carpi- ulnaris, Ulnaris externus). Origi- 

 nates on the external condyle of the humerus, is 

 inserted on the proximal end of the os carpi-uhiare. 



Thimero-metacarpalis III., IV., V. (Plate II., 

 Fig. 2, b) (Extensor digitorum longus, Aeusserer 

 Speichenmuskel or Speichenstrecker der Hand, 

 Extenseur commun, Extensor radialis longus, 

 Extensor digitorum communis). This muscle lies 

 between the humero-carpi-radialis and the humero- 

 carpi-ulnaris muscles. It springs from the con- 

 dylus externus humeri and divides, on reaching 

 the carpus, into three thin, flat tendons, which in 

 part fuse with the carpo-phalangei muscle, and in 



