PLATE 6 



EXPLANATION OF FIGURES 



(Cryptobranchus allegheniensis) 



Bichromatc-acetic-formalin fixation. X 4. 



Ventral view of the embryo shown in the preceding figure. 



Dorso-lateral view of the embryo shown in the preceding figure 



Dorsal view of the embryo shown in the preceding figure. 



Ventral view. 



Lateral view of the embryo shown in the preceding figure. 



Lateral view. 



Dorsal view. 



Lateral view of the embryo shown in the preceding figure. 



Lateral view. 



Lateral view. 



570 



