Plate V. 



Fig. 40. Salamandra maculosa, adult. Section through the stilus colu- 

 mellse which is continuous with the palatoquadrate. 



Fig. 41. The same. Section farther caudad, through the cephalic end of 

 the operculum. 



Fig. 42. The same. Section farther caudad through the operculum and 

 the recessus. The M. opercularis would be shown in a section farther caudad. 



Fig. 43. Triton cristatus, adult. Section through the cephalic portion of 

 the operculum. 



