56 



ANATOMY OF VERTEBRATES. 



fibres directly from the radius, and its tendcn is shorter and much 



thicker than in Man. 

 In both it passes 

 through a pulley pro- 

 vided by the trapezium 

 to its insertion into the 

 base of the metacarpal 

 of the index. The 

 tendon of the supina- 

 tor lonsjus in the Go- 

 rilla, fig. 24, 4', is also 

 shorter and thicker, 

 and is not crossed, as 

 in Man, by the exten- 

 sors of the metacarpal 

 and first phalanx of 

 the pollex (^g. 23, n 

 and 12) before its in- 

 sertion into the styloid 

 process of the radius. 

 Part of the carneous 

 mass of the flexor sub- 

 limis digitorum is seen 

 at 13, fig. 23, and e', 

 ^g. 24. External to 

 this a greater pro- 

 portion of the flexor 

 profundus appears in 

 the Gorilla, fig. 24, 6, 

 than in Man, fig. 23, 

 15. The flexor longus 

 pollicis, fig. 23, 14, ex- 

 pends its force in the 

 Gorilla, fig. 24, 20, 

 upon both the pollex 

 and index, furnishing 

 tendons to the distal 

 phalanx of each, but 

 the largest and most 

 direct being that to the 

 index. There are mo- 

 difications of minor 



importance in the origin of this muscle which tend to give it a 



Muscles of the fore-arm and hand, Gorilla. 



