444 C. J. Sundevall o» the Wings of Birds. 



cubitus. The pronator superior is distinctly separated and 

 somewhat longer; the supinator also rather beyond ^, 



b. The bellies of the muscles are less convex and rather 

 longer than in the Oscines, in consequence of which the pits 

 on the forearm are shorter. To this it is due that i\ie flexor 

 carpi radialis commences far down, at f . 



c. The curvature of the ulna is somewhat longer (to ^) at 

 the upper extremity, inconsiderable at the anterior extremity; 

 whence follows a position of the posterior flexors which begins 

 to differ somewhat from that in the Song-birds. 



d. The fascia ulnaris is filiform, although a distinct streak. 

 The flexor digitorum sublimis, which is attached to it, is like 

 that of the Song-birds in Picus major ; but in P. martius it 

 has a much more elongated belly ; it goes to | of the cubitus 

 and commences a little way from the humerus. 



e. The deltoideus is much smaller than in the Oscines, only 

 to I of the humerus. 



Jynx torquilla resembles Picus : but both pronatores are 

 inserted on the radius, the superior at |, the inferior at ^. 

 They are much stronger than in the Oscines and more dis- 

 tinctly separated. The flexor digitorum sublimis is much 

 thicker than in the Song-birds, fleshy for | of its length, and 

 placed beside the flexor carjn ulnaris. The extensor carpi 

 radialis brevis as in the Song-birds. 



Columba, which has been referred to in the general descrip- 

 tion, presents nearly equal peculiarities in its broad extensor 

 carpi radialis, its enormously large pjronatores, &c. It has, 

 further, an unusually constructed muscular apparatus within 

 the fold of skin in front of the humerus. 



The Ostrich, according to the description given by Schopss, 

 has many peculiarities, and therefore the following extract 

 may be given : — 



The extensor carpi radialis longus commences high up on 

 the humerus, at |. 



The ext. carpi rad. brevis is as in the Grallae &c. 



The ext. digitorum communis has no sinew to the thumb. 



The ext. indicis, from ^ of the radius, has many accessory 

 muscles. 



