26o CLAP p. 



EXPLANATION OF PLATE XVIII. 



Fig. 6. Embryo of Batrachus at time of hatching, showing the different lines 

 of organs well defined. X 15. 



Fig. 7. Side view of head of larva, showing sense organs on the surface. X 6. 



Fig. 8. Front view of same. 



Fig. 9. Side view of head, a few days later, showing canals in process of 

 formation. X 6. 



Fig. 10. Front view of same. 



Fig. II. Dorsal view of same. 



Fig. 12. Dorsal view of brain, showing roots of cranial nerves. X 6. 



Fig. 13. Diagram showing connections between the VII and X. The intra- 

 cranial commissure, and the anastomosis of the recurrens facialis with a branch 

 from the X. The VIII has been omitted, as also the portion of the A' innervating 

 the branchial region. 



