ii8 THE SALAMANDER 



the proximal end of the fibula, and passes directly down the leg to 

 the tarsus, where it merges into a flat transverse tendon which is in- 

 serted on the distal row of tarsal bones — the basalia. As in the hand, 

 the MM. contrahentes digitorum arise in part from this tendon. 



Innervation: From N. fibularis, and mainly from its R. medianus. 



Function : It is the deep flexor of the tarsus. 



MM. contrahentes digitorum (m.c.d.). Ribbing (i 909). 



Flechisseurs profonds des phalanges .... Perrin (1892). 

 Flexores breves medii s. contrahentes digitorum . Eisler (1895). 



Flexores digitorum profundi breves .... Osawa (1902). 

 Flexor brevis medius ..... McMurrich (1904). 

 Together with the former muscle = 



Flexor digitorum profundus .... Humphry (1872). 



Fibulae-metatarsi et digiti I-V . . . Hoffmann (1873-8). 



As already mentioned, this series of small flexor muscles arises partly 

 from the tendon of insertion of M. cap. long. muse, contra., and 

 partly from the basalia. The slip going to the first digit is slight 

 and weak, while its direction is very oblique owing to the fact that 

 it arises at the base of the second digit from the fused basale I + 11. 

 The slip to the second digit also takes origin from this double basale 

 and from basale III, while the third slip arises from basalia III 

 and IV. The fourth slip arises only from basale IV, but the fifth 

 originates from both IV and V. The insertion of each slip is by 

 means of a short tendon on the base of the proximal phalanx of the 

 corresponding digit. 



Innervation: By twigs from the plantar nerve loop which pass 

 dorsal to the muscles, thus separating them from the MM. flexores 

 breves profundi. 



Function : In the case of the first digit the muscle acts mainly as an 

 adductor, and only slightly as a flexor, while in the second, third, and 

 fourth the action is almost purely flexor, and in the fifth toe both 

 adductor and flexor. 



M. pronator prof undus (m.p.p.). Ribbing (i 909). 



Pronateur du pied Perrin (1892 a). 



Rotateur direct du pied Perrin (1892). 



Fibulo-tarsalis ....... Eisler (1895), 



Plantaris profundus I McMurrich (1904). 



Together w^ith M. flex. ace. med. = 



Pronator pedis ...... Humphry (1872). 



