PLATES 1 AND 2 



EXPLANATION OF FIGURES 



1. Drawing, made with the aid of the camera lucida, of the ganglion of the 

 N. terminalis of Mustelus canis after staining with methylene blue (intra-vitam). 

 The arrow points towards the peripheral end of the nerve. X 90. 



2, 3, 4, 5, 6. Drawings, made with the aid of the camera lucida, of cells oc- 

 curring in the ganglion of the N. terminalis of Mustelus canis after staining with 

 methylene blue (intra-vitam). The stipple is used in a conventional way and 

 does not indicate protoplasmic granulations. Figures 2, 3, 4, 5, X 235; figui'o 

 6, X 250. 



440 



