296 ; BOTANICAL GAZETTE 
namely that xerophytic leaf structure is not alway. 
abundant transpiration, but sometimes exists only for 
gencies to protect the plant from injurious loss of 
In conclusion, the writer can only express his re 
so far been able to investigate only one phase of #1 tl 
the Mediterranean region. A detailed study of 7 
activity, month by month throughout the year, | 
results of much value. 
Naptes, ITALY. 
