H. MUNRO FOX 



499 



The edges of the flagellate band which touched the moss on either 

 side immediately move back from it and bend inwards (Fig. 12) 

 and in a few minutes the band has reformed with an indentation to 

 include the moss (Fig. 13). Replaced in the dark the band straightens 



Fig. 12. Bending inward of the ends of the flagellate band in contact with the 

 moss when the preparation shown in Fig. 11 is brought from darkness into 

 daylight. 



lv«^„,....^ 



P"'"°"""'^ 



Fig. 13. Reformation of the flagellate band inside the moss after the prepa- 

 ration shown in Figs. 11 and 12 has been in daylight for a short time. 



out again to its original position as the extra oxygen which was pro- 

 duced by the plant in the light is consumed by the flagellates. The 

 two ends of the band in touch with either side of the moss bend slightly 

 outwards towards the edge of the slide (Fig. 11) because the moss 

 is now absorbing oxygen. 



