l8 l^iL\cu, The Myology of the Bell-Magpie. [^f^' 



Emu 



July 



thin muscle, quite hidden by surrounding muscles. It is soon 

 converted into a hair-hke tendon, which passes in close connection 

 with the large tendon of the extensor metacarpi radialis longior 

 (73), to be inserted close by it on the palmar side of the first meta- 

 carpal. Shufeldt found it " the smallest and most delicate 

 muscle of the forearm " in the American Raven ; so it is in 

 Strepera and the other birds dissected. 



80. The anconeus arises by a strong tendon from the external 

 condyle and passes directly to the inner side of the ulna, to be 

 attached for rather more than half its length. 



81. The extensor indicis longns [25] arises fleshy from more than 

 the inner half of the ulnar side of the radius as an inconspicuous 

 muscle. It gives rise to a narrow tendon of great length that 

 passes down almost to the tip of the hand. It passes over the 

 groove at the distal end of the ulna, directly down the front of 

 the metacarpus and the proximal phalanx of the index finger, 

 to be inserted at the base of the distal phalanx of that finger. 



8ifl. The flexor digitontm suhlimis is a strong tendinous band 

 with some muscle fibres. It is superficial to the lower muscles 

 of the forearm on the inner side. It runs from the internal condyle 

 of the humerus to the wrist, where it is bound firmly, and then 

 passes on as a tendinous cord to the index finger. Gadow figures 

 it similarly in Falco tinminculus . 



82. The flexor digitonim profundus [26] arises by two strong 

 fleshy heads from the proximal end of the ulna. The brachialis 

 anticus and biceps are inserted between these two heads. The 

 fibres from these heads soon merge, and the common muscle is 

 attached to the ulna for a short distance. The long tendon 

 passes through the fibrous loops on the wrist. It runs to the front 

 upper edge of the end of the metacarpal along the anterior upper 

 edge of the proximal phalanx of the index finger, joins a fibrous 

 sheath, and is inserted into the ulnar side of the base of the distal 

 phalanx of this finger. 



83. The flexor carpi ulnaris [26] in Strepera differs from the 

 American Raven as described by Shufeldt. Shufeldt describes 

 this muscle as arising in the American Raven by " two strong 

 tendons which merge into a strong fusiform muscle occupying 

 rather more than the posterior half of the under side of the 

 forearm. From the anterior apex of this muscle a powerful and 

 subcylindrical tendon stretches directly to the back of the ulnare 

 ossicle of the carpus, where it makes an extensive attachment. 

 Just before reaching this ossicle the tendon of the flexor carpi 

 ulnaris differentiates off a small tendinous sHp, which, passing 

 through a fibrous loop at the ulnar side of the carpus, goes 

 obliquely downwards to the tendon of the flexor digitonim 

 profundus and merges with it." 



In Strepera the two parts are distinct. They arise as Shufeldt 

 described for the American Raven. The tendon of the lower part 



