234 



Journal of Comparative Neurology, 



TABLE VII. 

 Tabulation of muscular and cutaneous nerve fibers to the thigh for Frog C. 



In frog B, Table VI, the left side exhibits 1729 muscular 

 fibers, 871 cutaneous fibers, the riglit side 1747 muscular fibers 

 and 876 cutaneous fibers. In the case of frog C, Table VII, 

 1558 muscular, 12 19 cutaneous fibers innervate the left thigh, 

 and 1535 muscular, 1279 cutaneous fibers, the right thigh. The 

 fibers innervating the muscles are shown by both tabulations to 

 exceed in number those innervating the skin. 



5. Relation of the number of cutaneous fibers to the cutane- 

 ous area innervated. 

 For the determination of the cutaneous area of the thigh a 

 frog of approximately the same length as that of frog B and 

 frog C was selected, Sex, female. Length 18 cm. Weight 39 

 grams. The measurements were made upon the left leg. The 

 lines marking the location of the hip and knee joints were 

 selected as the upper and lower limits of the thigh area. The 

 rounding dorsal and ventral surfaces of the thigh were reduced 

 to flat surfaces by compression between two glass plates. The 

 exterior of the upper plate was coated with a thin layer of par- 

 affin. In this paraffin was traced the outline of the flattened 

 thigh. This outline was then transferred to paper, and the area 

 embraced within it determined by means of the planimeter. 

 This area multiplied by two gave the area for the dorsal and 

 ventral surfaces of the thigh. While the plates were still in 

 place the distances between them at the anterior and posterior 

 limits of the thigh were measured at each lateral surface by an 



