C. J. Sundevall on the Wings of Birds. 445 



The ext. carpi ulnaris is half united with the humero-ulnaris 

 externus, which extends to f . 



The supinator strong, to |. 



The ^e.z'or* nearly as in the Waders &c.^ but the sinew of 

 t\\e flexor digit, profundus gives of£ a branch to the thumb, 

 instead of the ext. digit, comm. 



The pronator is single, to f . 



The hiceys has only the caput longum. 



The deltoideus also arises from the clavicle, and therefore 

 more resembles that o£ the Mammalia ; it terminates at f of 

 the humerus. 



The tensor plica cutaneee and rector remigum occur, not- 

 withstanding the undeveloped state of the wing. 



Aptenodytes, next to the Ostriches, is the most aberrant of 

 all known forms of birds, and therefore the following abstract, 

 also from Schopss's description, may be of interest in this 

 place. The wing is perfectly formed, as in birds, and only 

 in its external form and strong compression has it some re- 

 semblance to the pectoral fin of a whale, shark, &c. 



The extensores carpi radiates longus et brevis are nearly as 

 usual, the latter not small. 



The extensor digitorum communis gives off at the carpus a 

 branch to the extensor indicts proprius. 



Of the extensor carpi ulnaris there remains only a rudiment 

 of sinew-fibres. 



The humero-ulnaris externus is small. 



The supinator to | ; as in Alca, only on the outer side of 

 the radius. 



Of the two pronatores only sinewy rudiments. 



The flexor carpi ulnaris seems to consist only of a sinew 

 (perhaps the fascia ulnaris ?) , and the rector remigum is 

 wanting. On the other hand the flexor digitorum sublimis 

 commences from the condyle,and its sinew terminates on the 

 second phalange. 



The flexor digitorum profundus is not small ; also from the 

 radius. 



The flexor carpi radialis consists only of a few sinewy fibres, 

 as also the flexor and extensor ulnares. 



