THE MUSCLES OF THE UPPER EXTREMITY. 153 



91. The interosseous dorsal is is the outermost and 

 hisfher of the two delicate muscles that fill the long vacuity 

 existing between the index and medius metacarpal. 

 It is attached to the margins of the shafts of both these 

 bones, then sends obliquely downwaixls a slender tendon, 

 which lies fiat ao^ainst the radial side of the skeleton of 

 the hand, to be finally inserted at a point on the an- 

 terior aspect of the base of the distal phalanx of the 

 index dioit. The contraction of this muscle extends 



o 



the lowermost finger-joint of the hand in the Raven. 



92. The interosseous pahnaris ^ lies in the same vacuity, 



1 Gadow offers the following synonymy foi' the two interosseous 

 muscles I describe above, to wit : — 



" 95. M. INTEROSSEUS DORSALIS. 



L' interosseux anterieur. Vicq d'Azyr, p. 577. 



Aeusserer Mittelhandmuskel (Interossetis externus.) Tiedemann, 



§ 283 : Heusiuger, p. 197, No. 39. 

 Innerer 8trecker und Abzieher des zweiten Fingei's. Meckel, p. 



350, No. 6. 

 Abzieher des Zeigefingers {Abductor ^j/i«/«?i^?s sccunclce indicis). 



Schopss, p. 172, No. 46. 

 Oberer Mittelhandmuskel (Vorleger der Lenkfeder.) Prechtl, § 66. 

 Interosseux anterieur ou abducteur du medius. Milne- Edwards, pi. 



9, fig. 3. 

 Interossevs. Selenka, p. 137, No. 69. 

 Jnterosseus II. ulnar is. Ue Man, No. 34. 

 Interosseux dorsal. Gervais et Alix, p. 30. 

 Vadducteur dorsal du deuxieme doigt. Alix, p. 419. 

 Interosseus dorsalis. Watson, p. 100 ; Carlsson, p. 25. 



" 99. M. INTEROSSEUS PALMARIS. 



U interosseux x>oslerieur. Vicq d'Azyr, p. 577. 



Innerer Mittelmuskel {Interosseus internus). Tiedemann, § 284 ; 



Heusinger, p. 197, No. 40. 

 Aeusserer Strecker und Abzieher des zweiten Fingers. Meckel, p. 



350, No. 7. 

 Beuger des Zeigefingers. Schopss, p, 173, No. 47. 



