362 ZOOTOMY. 



Jl.d.c", its tendon to the second di^it, in great part removed to i-how the 

 interossei : Jl.d.c 5 , its tendon to the fifth digit : i.o, interossei : Ib.i, 

 M.2, Ib.T), lumbricales : pi, plantaris : pP, its tendon to the second digit, 

 partly removed and with its distal end reflected : // 4 , its tendon to the 

 fourth digit, partly removed, and having the sheath it forms over the 

 metatarso-phalangeal articulation slit up and reflected right and left : 

 pr.b, peroneus brevis : pr.d.^, peroneus quarti digiti : pr.d.$, peroneus 

 quinti digiti : pr.l, peroneus longus : t.ach, tendo Achillis, inserted into 

 the calcaneum : tb.a, tibialis anticus : //, tibia. 



muscle forming the posterior surface of the shank : its 

 inner head (qs l ) arises from the inner condyle of the 

 femur and pre-axial fabella ( 94), its outer head (qs z ] 

 from the outer condyle and post-axial fabella : the two heads 

 unite with one another and with the soleus ( 461) to form 

 a large strong tendon, the tendo Achillis, which is 

 inserted into the extremity of the calcaneum. 



461. The soleus (so), a small muscle seen by turning 

 aside the outer head of the gastrocnemius ; it arises by a 

 long tendon from the Jiead of the fibula, and joins the 

 gastrocnemius to form the tendo Achillis> 



462. The plantaris (//), a large mu?cle, the proximal 

 fleshy part of which is enwrapped by the gastrocnemius, from 

 which it must be carefully separated : by dividing and 

 reflecting the gastrocnemius and soleus, the plantaris is seen 

 to arise from the posterior surface of the femur immediately 

 proximal to the outer condyle and from the post-axial fabella : 

 at about the middle of the crus it passes into a strong flat 

 tendon, which curves round to the posterior side of the tendo 

 Achillis and over the end of the calcaneum to reach the sole 

 of the foot : the tendon divides into four slips, which arc 

 related to the digits in the same way as those of the flexor 

 sublimis to the digits of the manus ( 425) : divide and 

 reflect. 



463. The popliteus (pp\ or rotator of the knee, lying 

 obliquely across the back of the knee-joint : it arises by 



