694 'Journal of Comparative Neurology and Psychology, 



gives a composite dissection of the lumbo-sacral plexus of the leopard 

 frog, Rana pipiens, with the lines broken at the points at which 

 counts were made. Tables I and II explain the designations and 

 the destinations of the individual nerve branches. S^, So, and So 

 indicate successive levels in the course of the nervus ischiadicus. 



Fig. 1. 



The succeeding tables present the findings for frog E, with the addi- 

 tion of explanatory findings for the control frog IIB in Tables VI, 

 VII, VIII, X and XVII. 



Frog E was a female, length 229 mm., corrected weight at the 

 time of killing 49 gTams. The initial corrected weight could not be 



