220 STRONG. 



EXPLANATION OF PLATE VIL 



Fig. I. Vertical section through the epidermis of a tadpole, showing termina- 

 tions of the Trigeminus. X 155. 



Fig. 2. Somewhat oblique vertical section through the oral epithelium, 

 showing the terminal plexus of the R. maxillaris V (+ palatinus VII .?). X 192. 



Fig. 3. Section similar to Fig. 2, showing the terminal plexus of the R. oph- 

 thalmicus V (-t- palatinus VII). X 192. 



Fig. 4. Section similar to Fig. i. X 192. 



Fig. 5. Section through the lower labial cartilage, showing the perichondral 

 plexus and the intraepithelial plexus arising therefrom of the R. mandibularis V. 

 X72. 



Fig. 6. Horizontal section through the above-mentioned perichondral nerve 

 plexus. 



Fig. 7. Similar section through the above, showing also the entire end of the 

 labial cartilage. X 31 5. 



