1872.] 



MR. A. SANDERS ON LIOLEPIS BELLI. 



169 



five slips, each of which terminates in a broad thin tendon, which 

 is inserted into the terminal phalanx of each digit ; the division which 

 belongs to the pollex differs from the others, inasmuch as it arises 

 from the extensor surface of the bone of the first row of carpals 

 which perhaps represents the combined cuneiform and semilunare, as 

 it articulates with the whole breadth of the distal extremity of the 

 ulna ; it crosses the extensor surface of the carpus, and joins the slip 

 which arises from the metacarpal bone of the pollex. 



Abductor quinti digiti (fig. 7) arises from the same bone as the 

 last ; it passes along the outer side of the fifth digit, being bound 

 down at the first phalanx, and finally joins the tendon of the extensor 

 of that digit. 



SIP 



Tendons on dorsal aspect of the hand, twice natural size. 



Abductor quarti digiti arises from the contiguous surfaces of the 

 proximal extremities of the fourth and fifth metacarpal bones ; its 

 tendon is inserted into the ulnar side of the last phalanx of the fourth 

 digit. 



Three dorsal interossei (fig. 7) are visible on the extensor surface 

 of the hand : the first arises from the whole length of the metatarsal 

 bone of the second digit, and is inserted into the ulnar side of the 

 base of the first phalanx of the pollex ; the second in like manner 

 goes from the metacarpal bone of the third to the ulnar side of the 

 first phalanx of the second digit ; the third goes from the metacarpal 

 bone of the fourth to the ulnar side of the first phalanx of the third 

 digit ; these are all abductors, and seem to be in series with the ab- 

 ductors of the fourth and fifth digits. 



