THE MFSri.KS. 



1. The third finger has two, one to the radial side (Fig. 79 2^3), 

 one to the ulnar side. 



2. T^LQ fourth finger has three, the third (Fig. 79 ^4) arises from 

 the carpus, and perhaps ought rather to be regarded as an extensor. 



3. The Jiff ft finger has two. 



IV. MUSCLES OF THE HINDER LIMB. 



I. MUSCLES or THE THIGH. 



General arrangement (Figs. 80, 81). 



a. The m. triceps femoris forms the outer border of the thigh, and 

 extends on to both the dorsal and ventral surfaces. The outer 

 border therefore corresponds with the anterior surface of the thigh 

 of man, in consequence of the thigh in the frog being normally 

 rotated outwards. 



b. The m. vastus interims (v.i.} and a portion of the adductor longus 

 (ad'), the sartorius (s), a portion of the aildnrf.or n/ai/nus (ad'"), and 

 the rectus intermix major (r.i') are found on the inner surface of the 

 thigh. 



c. The rectus interims minor (r.i") forms the inner border. 



d. On the dorsal surface are to be seen, nearest the trunk, the 

 glutaeus (gl), on the outer border the vastus externus (v.e.), the/^/v- 

 formis and biceps (p and b), then the semimembranosus ( '>>//), and lastly 



the rectus interims minor (ri"). 



e. By reflecting the rectus interims major (compare Fig. 82) there 

 are exposed to view : the semiteitdinosus (st), the whole length of 

 the adductor lonyus, magmis (ad' and ad'"), and brevis (ad"). By re- 

 flecting the triceps, one sees (Figs. 84, 85) the ilio psoas (ip), and 

 beneath the sentimeinbranows, the quadrates (qf), and capsularis 

 femoris (off). 



Description of tie fte/mrafe j\Iusc/<>x. 

 (A.) Muscles of the dorsal surface. 

 109. M. g/iitaeus (Fig. 80 gt). 



Duges, ex-ilio-trochanterien. Zenker. gluiams maior. 



The tendinous origin of this muscle is found on the outer surface 

 and upper border of the two hinder thirds of the iliac bone. Thence 

 it runs outwards and backwards between the head of the ///. rtixlus 

 externus (ve) on the one side, and the ilio-psoas and m-hix aiificus (ra) 



