868 



SEB. F. G. PAESONS ON THE 



[Nov. 29, 



correspond to the condylo-radial and condylo-central elements 

 described by Windle \ In the hand a tendon is given off to 

 each of the five digits. The nerve-supply of the muscle is derived 

 entirely from the median. 



The Lumhricales are four, and are arranged as in man. 



The Pronator Quadratus is attached to the lower third of the 

 radius and ulna. 



The Supinator Loiujus is ahsent. It is present in the Dipodidae, 

 but is usually absent in the Hystricouiorpha. 



The Extensores Carpi Radiales Longior and Brevior are normal, 

 the latter being the larger. 



The Extensor Communis Digitorura goes to the four ulnar digits. 



The Extensor Minimi Digiti goes to the 5th digit only. 



The Extensor Carpi Uhviris and Extensor Ossis Metacarpi Pollicis 

 are both normal. 



The Extensores Primi ct Secundi Iniernodil Pollicis are absent. 



The Extensor Indicis is small and only goes to the index. 



The Supinator Brevis is large and is inserted into the upper two- 

 thirds of the radius. A large sesamoid bone which rests against 

 the head of the radius is developed in the tendon. 



The panniculus of Pedetcs 



Haiul-Musdes. — From the ulnar and distal sides of the radial 

 ossicle muscular fibres arise : some run inwards to the ulnar 

 ossicle, forming a palmaris brevis ; some run distalward to the 

 skin of the palm, while others again pass to the pollex, forming 

 an indistinct abductor and flexor brevis pollicis. The hypothenar 

 muscles are very feebly marked and indistinct, but an abductor 

 minimi digiti can be made out. 



The second layer of hand-muscles consists, as is so often the 

 case, of adductores pollicis, indicis, et minimi digiti. 



In the third layer there are two-headed flexores breves to each 

 finger. 



Among the Trunk-Miiscles the Panniculus camosus is remarkable 



• Joura. of Anat. \ ol. ssiv. p. 72. 



