Dunn, Mcdullatcd Nerve Fibers. 689 



TABLE II. 



Names and clesignatious of the primary uerve branches passing to the 

 muscles and slvin of the shanlv in the leopard frog, Kana pipiens. 



T. Nervus tibialis. 



Ta. Ramus cutaueus cruris posterior. 

 Tj3. R. muscularis to the M. plantaris longus. 

 Tl. R. superficialis of the N. tibialis. 



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

 Tib. R. cutaneus cruris medialis inferior. 

 T2. R. profundus of the N. tibialis. 



T2a. R. cutaneus cruris medialis superior. 

 T2b. Rr. musculares for the M. tibialis posticus. 

 P. Nervus peroneus. 



Pa. R. articularis genu et pedis. 

 Part. R. articularis genu. 

 Pa/?. R. articularis pedis. 

 Pb. R. cutaneus cruris lateralis. 

 Pc. R. musculari.s to the M. extensor cruris In-evis. 

 Pd. Rr. musculares to the M. peroneus. 

 PI. N. peroneus lateralis. 



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

 P2. N. peroneus medialis. 



P2a. R. muscularis to the M. tibialis anticus longus. 

 P2b. Rr. musculares to the M. tibialis anticus brevis. 



Distribution of the ISTerve Branches Supplying the Leg of 

 THE Leopard Frog and of Frog E in Particular. 



A comparison of the innervation of the leg of the leopard frog 

 with that of Rana esculenta has been made in previous papers, 

 Dunn, 1900 and 1902. The terminology and the designations for 

 the nerve branches used in those papers have been adopted for this 

 paper. Tables I and II, repeated in the present paper, summarize 

 the names and designations of the branches to the thigh and the 

 shank. The terminology follow^s that for Rana esculenta in Gaupp's 

 edition of Ecker's and Wiedersheim's Anatomie des Frosches, 1896- 

 1901, v^^ith such minor modifications as slight differences in inner- 

 vation have made necessary. 



In the operated frog E but one anomalous branch was found in 

 the thigh. S4 and 5, which usually leave the IsT. ischiadicus by a 

 common trunk, were found in the left leg joined, in the beginning of 

 their course, to S6. 



