The Muscles 109 



part are inserted on the carpal bones of the third, 

 fourth, and fifth fingers. 



Carpo-phalangei (Plate II., Fig. 2, d). (Extensor 

 digitorum brevis, Extenseurs courts, Gemein- 

 schaftlicher Strecker der Hand, Extensor digitorum 

 communis brevis). Springs from the carpal and, 

 in part, from the metacarpal bones and is inserted 

 on the terminal phalanges of the five fingers. 



Uhio-car pi-radial is (Ein dem Strecker und Ab- 

 zieher des Daumens analoger Muskel, Extensor 

 pollicis longus. Extensor carpi-radialis brevior[?]). 

 Springs from the under half of the ulna, and is 

 inserted on the os carpi-radiale. 



Carpo-phalangeus I (Extensor pollicis brevis). 

 This is a small, thick muscle that originates on the 

 distal part of the os carpi-radiale and is inserted 

 on the phalanx of the thumb. 



Humero-radialis Lateralis (Plate II., Fig. i, 6) 

 (Flexor carpi-ulnaris, Innerer Ellenbogenmuskel, 

 Ulnaris internus). A fairly strongly developed 

 muscle. It springs from the internal condyle of 

 the humerus, extends along the ulna, and is inserted 

 on the proximal part of the os carpi-ulnare, and 

 the nearby pisiform bone. 



Humero-radialis Medialis (Plate II., Fig. i, 2) 

 (Flexor carpi-radialis, Radialis internus). A 

 strongly developed muscle. It springs from the 

 internal condyle of the humerus, receives fibers 

 from almost the entire length of the radius, and 

 is inserted on the proximal end of the os carpi- 



