PLATE 14 



EXPLANATION OF FIGURES 



Cross-section of metamorphic stage III. X28 



37 Level corresponding to adult, figure 22, showing anlage of 'little horns' 

 and lingual cartilage. 



38 Level corresponding to adult, figure 23, showing changing shape of basi- 

 branchial and ceratohyals. 



39 Level corresponding to levels shown in larva figure 9, in metamorphic 

 ages II and III, figures 30, 34, and in adult figure 24. 



40 Level corresponding to larva, figure 10, and adult, figure 25, showing the 

 plate and M. thoracohyoideus nearly broken down. 



578 



