THE MUSCLES 91 



from the distal angles of the carpalia, while the most posterior muscle 

 arises also from the ulnare+intermedium. They are inserted on the 

 respective metacarpalia. It is noteworthy that the M. flex. brev. 

 prof, of the first digit arises from the combined first and second 

 carpal and not from the carpal of the pre-pollex. It is a very slight, 

 narrow muscle, much smaller than the others. 



Innervation : From the palmar branches of the NN. ulnaris and 

 interosseus. 



Function : They are the flexors of the metacarpalia. 



MM. flexores digitorum minimi. Ribbing (1907). 



Metacarpo-phalangei . Humphry (1872); Hoffmann (1873-8). 



Flechisseurs primitifs des phalanges (45-8) . . Perrin (1899). 



Metacarpo-phalangeales ..... Osawa (1902). 



These are very slight, narrow muscles which arise from about the 

 middle of the ventral side of the metacarpals of the second, third, and 

 fourth fingers, and are inserted on the proximal ends of the proximal 

 phalanges of the corresponding digits. There is no representative of 

 this series of muscles in the first digit. 



Innervation : From the palmar branches of the NN. ulnaris and 

 interosseus. 



Function : Flexors of the digits. 



M. interphalangeus digiti III (m.i.ph.3) (mihi). 



Phalangeus ....... Humphry (1872). 



Interphalangeus digiti IV Hoffmann (1873-8); Eisler(i895); Ribbing 



(1907)- 

 Flechisseur primitif de la troisieme phalangine (43) . Perrin (1899). 

 Interphalangeahs . . . Osawa (1902); McMurrich (1903). 



A very small, weak muscle arising from the ventral surface of the 

 proximal phalanx of the third finger. It is inserted on the proximal 

 end of the second phalanx of the same finger. 



Innervation : From the N. interosseus. 



Function : Flexor of the third digit. 



MM. intermetacarpaies (m.i.mc). McMurrich (1903). 



Interossei dorsales ..... Riidinger (1868). 



Interossei Humphry (1872); Hoffmann (1873-8); Eisler (1895); 



Osawa (1902); Ribbing (1907). 

 Intermetacarpiens (53-5) ..... Perrin (1899), 



These are short triangular muscles lying between the digits con- 

 necting each finger with its neighbour. They can be fully seen 

 from the ventral side only after removing the MM. flex. brev. prof. 



