THE NERVOUS SYSTEM OF AMPHIBIA 



213 



Pig. 10 From an embryo of the same age, same fixation and same staining 

 as the last; transverse phme; 10 u. At the level of the fifth and sixth myotomes 

 cephalad of the unsegmented mesoderm. 



Fig. 11 From a section adjacent to the last. 



Fig. 12 From the same embryo; two sections removed from the last. 



Fig. 13 From the same section as that of figure 11. 



Fig. 14 From the same embryo, between the second and third myotomes 

 cephalad of the unsegmented mesoderm. 



