Donatpson, Law of Innervation. 225 
(2) The relative weight of the muscles of the thigh, shank 
and foot. 
In an earlier study, made in collaboration with Mr. ScHoeE- 
MAKER (1900) it was determined in Rana virescens that the 
relative development of the muscles of the frog’s leg, as indi- 
cated by the weight of the muscles of the thigh compared with 
those of the remainder of the leg, was nearly constant for all 
groups above five grams in body-weight (see DonaLpson and 
SCHOEMAKER, 1900, pp. 124-125). 
TABLE ILI. 
Giving in grams the weights of the muscles in the thigh, shank and 
foot of the Frog—R. virescens. (From Table VII, DonaLpson 
and SCHOEMAKER, 1900.) 
Boay Weight of Muscles 
No| Sex | Weight | Leth. | Thigh| Shank} Foot 
rigeil| oly 29.40 E85) | 3-LO5| Koray) 2533 
3-097 1.201] .538 
O| 1.240] .659 
19] -F | 30-45 179 | 3-3 
era -195| .603 
GQ Go 
ho 
| 
_ 
20| F 33-96 172 3-480] 1.393} .603 
3-681) 1.354] .631 
22| M | 38.16 200 | 3-637} 1.563) .715 
3-536] 1.456} .653 
23) ik 42.54 215 4-455| 1.562) .822 
4-369) 1.535] .843 
_ 
25} M | 45.37 205 | 4-383) 1.496] .869 
4.278] 1.493 816 
-797| 1.844] .926 
.830| 1.828} .926 
4 
4 
AA Ae 47-58 206 4. 
4 
713) Deepal. 824 
-616) 1.813} .871 
23) F 48.33 220 | 5-402; 1.906) 1 006 
§-430| 1.949] 1.019 
> 2c 52.55 206 | 5-404) 2.450)  .835 
5 456) 2.400] .850 
