PLATE 7 



EXPLANATION OF FIGURES 



Differential recovery and differential inhibition with general recovery 



68 to 73 Further cases of differential recovery, showing various differences 

 in detail; figure 71 from an exogastrula. 



74 to 77 Cases in which differential recovery is limited to the development 

 of a rudimentary oral lobe; figure 77 a partial basal form. 



78 to 81 The lower limits of differential recovery. 



82 to 84 Persistent differential inhibitions after general recovery showing 

 under-development of apical and median anterior regions as compared with 

 basal lateral and posterior. 



IW 



