LLOYD 



PLATE 1 1 



EXPLANATION OF PLATE. 

 St'omata of Verbena ciliata at various times, under blue light. 



1. ^SO a. m. Experiment 213. 4. 11*30* a. m. (Cf. figure 3.) Experiment 215. 



2. Il h 30 m a. m. " " 5. 6 h 30 m p. m. " " " " " 

 2o. A plastid from figure 2. 6. Il h 30 m a. m. Experiment 217. 



8. Il h 30 m a. m. Experiment 213, control. 



