320 DION^A MUSCIPULA. CHAP. XIII. 



must have been equally affected ; and 1 can under- 

 stand the divergence of the lobes only by supposing 

 that the cells on the lower side, owing to their state of 

 tension, acted mechanically and thus suddenly drew 

 the lobes a little apart, as soon as the cells on the 

 upper surface were killed and lost their contractile 

 power. We have seen that boiling water in like 

 manner causes the tentacles of Drosera to curve back- 

 wards ; and this is an analogous movement to the 

 divergence of the lobes of Dionaea. 



In some concluding remarks in the fifteenth chapter 

 on the Droseraceae, the different kinds of irritability 

 possessed by the several genera, and the different 

 manner in which they capture insects, will be com- 

 pared. 



