Cxar. L STRUCTURE OF THE LEAVES, 3 
excellently adapted for the special purpose of catch- 
ing insects, so that the subject seemed well worthy of 
investigation. 
The results have proved highly remarkable; the 
wore important ones being-—firstly, the extraordinary 
Q y T@ a 
Qs ip ry 
Fic, 1.* 
(Drosera rotundifolia.) 
Leaf viewed from above; enlarged four times. 
sensitiveness of the glands to slight pressure and to 
minute doses of certain nitrogenous fluids, as shown 
by the movements of the so-called hairs or tentacles ; 
* The drawings of Drosera and~ cularia, by my son Francis. They 
Dionwa, given in this work, were have been excellently reproduced 
made for me by my son George on wood by Mr. Cooper, 188 
Tarwin: those of Aldrovanda, and  Strard, 
of the several specixs of Utri- 
