220 Journal of Comparative Neurology. 



A. A Comparison of Rana virescens with Rana esculenta and 

 Ra7ta temporaria. 



With minor variations, to be noted later, the innervation 

 of the skin and muscles of the thigh in Rana virescens corres- 

 ponds to that of Rana esculenta and Rana temporaria as given 

 in Gaupp's edition of Ecker's und Wiedersheim's Anatomic des 

 Frosches/ 1896-99. A concise presentation of the innervation 

 in Rana virescens is offered in Table I. The nomenclature 

 adopted is that used by Gaupp in the description of Rana 

 esculenta.^ 



TABLE I. 

 Branches of Crural and Sciatic Nerves. 

 C. Nervus cruralis s. N. femoralis anterior. 



a) Ramus cutaneus femoris lateralis. 



b) R. muscularis to the M. tensor fasciae latae. 



c) Rr. musculares to the M. iliacus internus and the M. iliacus 



externus. 

 d and e) Rr. musculares to the M. adductor longus and the M. 

 pectineus. 

 S. Nervus ischiadicus s. N. femoralis posterior. 



1. Branches to the plexus ischio-coccygeus. 



2. R. cutaneus femoris posterior. 



3. R. muscularis to the M. pyriformis. 



4 and 5. Rr. musculares to the M. gemellus and the M. obturator 



internus. 

 6. R. profundus posterior. 



a) R. adductorius. 



I) — to the M. adductor magnus. 

 2) — to the M. quadratus femoris. 

 3) — to the M. obturator externus. 



b) R. descendens communis. 



1) R. anterior. 



a— R. muscularis to the caput ventrale of the M. semi- 

 tendinosus. 



ft — Rr. musculares to the caput ventrale of the M. abduc- 

 tor magnus. 



y — R, muscularis to the M. sartorius. 



2) R. posterior. 



a — Rr. musculares to the caput dorsale of the M. semi- 



tendinosus. 

 /5— Rr. musculares to the M. gracilis major. 



» Part II, pp. 194-197. 



' See Gaupp's edition. Part II, pp. 196-197. 



