LLOYD 



PLATE 14 



1. 6 h 30 m a. m. Experiment 211 



2. 11 a. m. 



3. 11 a. m. " 207. 

 3a. A plastid from figure 3. 



Explanation of Plate. 

 Stomata of Verbena ciliata in air deprived of carbon dioxid. 



4. 7 h 30 m p. ni. Experiment 207. 

 4o. A plastid i'roui figure 4. 



5. 6 a. m. April 30 and May 3. Stoma with 

 one dead guard-ceil, this containing an 



abundance of starch. 



