124 



C. M. CHILD 



/K 



27 



28 



29 



25 



30 



31 



Figs. 25 to 31 Effect of KCN on regulation. Figure 25, diagrammatic, indicat- 

 ing levels of section. Figure 26, piece including region between levels 1 and 3 

 in figure 25 : after ten days in KCN to o'o T^m. Figures 27 and 28, pieces including 

 regions between levels 3 and 5 in figure 25 : after ten days in KCN to (Tono m. Figure 

 29, from region I 2 in figure 25. Figure 30, from region 2 3. Figure 31, from region 

 g 4- all ten days in-KCN TooVoom. 



