26o 



Ross Granville Harrison 



becomes the n. ischiadicus of the primary Hmb, which may readily 

 be followed to the knee in a single section (Fig. 9). 



Within the primary limb the nerves may be clearly made out. 

 The large sciatic nerve passes distally parallel to the m. ilio fib- 



Primary Limb 



r cut.crurlat 

 fi.peroneus 

 rprofn.tibiaiis 

 rcut crur.med.sup. 

 r.superfic n.tibialis 

 r cutcrurpoit. 

 r.cut.fem.post. 



n. ischiadicus 



Accessory Limb 



Fig. 10 Experiment I. Section through the thigh of the primary "aneurogenic'' limb near the 

 medial surface, showing also the secondary limb cut through the hip joint. *a, r. cutaneus femoris 

 posterior, derived from n. ischadicus; b, accessor)' nerves derived directly from plexus. X67. 



rilaris and gives off near its beginning the r. profundus femoris 

 posterior. Before reaching the knee it divides into two subdivi- 

 sions, the n. tibialis and the n. peroneus. The latter gives off a 



