Dunn, Neii'e Fibers of the Frog. 301 



TABLE I. 



Tabulation of the chief Nerve Branches passing to the Skin and Mus- 

 cles of the Thigh in Rana virescens brachycephala, Cope. 

 C. Nervus cruralis s. N. femoralis anterior. 



a) Ramus cutaneus femoris lateralis. 

 S. Nervus ischiadicus s. N. femoralis posterior. 



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. 



7. R. muscularis to the M. ileo-femoralis. 



8. R. profundus anterior. 



[x. R. muscularis to the M. ileo-fibularis.] 



Table II is a presentation of all the nerve branches to the 

 shank. Gaupp's designations are used for these tables and for 

 Figure 1. 



Figure i is a dorsal view of the right plexus lumbo- 

 sacralis of Rana virescens, and includes all the ramifications 

 from the point where the spinal nerves emerge from the ver- 

 tebral foramina, to a point opposite the ankle. The attempt 

 has been made to represent in this figure the relative sizes of 

 the trunks and branches, and the points and order of branching. 



TABLE IL 

 Tabulation of the Nerve Branches passing to the Skin and Muscles of 



the Shank in Rana virescens brachycephala, Cope. 

 T. Nervus tibialis. 



a. Ramus cutaneus cruris posterior. 



f5. R. muscularis for the M. plantaris longus. 



1. R. superficialis of the N. tibialis. 



a. R. muscularis to the M. plantaris longus. 



b. R. cutaneus cruris medialis inferior. 



2. R, profundus of the N. tibialis. 



a. R. cutaneus cruris medialis superior. 



b. Rr. musculares for the M. tibialis posticus. 

 P . Nervus peroneus. 



a. R. articularis genu et pedis. 

 a. R. articularis genu. 



/?. R. articularis pedis. 



b. R. cutaneus cruris lateralis. 



c. R. muscularis to the M. extensor cruris brevis. 



d. Rr. musculares to the M. peroneus. 



1. N. peroneus lateralis. 



a. Rr. musculares to the M. tibialis anticus longus. 



2. N. peroneus medialis. 



. a. R. muscularis to the M. tibialis anticus longus. 



b. Rr. musculares to the M. tibialis anticus brevis. 



