DROSERA. 181 



The following is a brief summary of the experiments : 



First, with D. filiformis. 



July 11th, 10 a.m., pinned living flies half an inch 

 from apex ; 10.40 a.m., the leaves are bent perceptibly 

 towards them ; 12 m., the leaves have reached the flies, 

 and their legs are entangled in the tentacles and held 

 fast by the sticky substance exuding from the glands. 



Second, with D. longifolia. 



July 11th, 10.15 a.m., I place raw beef on the leaves ; 

 12.10 p.m., the leaves are folded around the beef. July 

 11th, 11.30 a.m., 1 place living flies on the leaves ; 

 12.48 p.m., one of the .leaves has folded entirely around 

 the fly ; 2.30 p.m., four leaves have each folded around 

 a fly. 



Third, with D. rotundifolia. 



July 11th, 10.35 a.m., raw beef on leaves ; 1 p.m., the 

 inner tentacles are curving about it, and the longer ones 

 on the outer edge of the leaf are slowly curving up- 

 ward ; 9 p.m., all the tentacles of the most vigorous 

 leaves are clasping the beef. July 11th, 10 a.m., I place 

 bits of raw apples on the leaves ; 9 p.m., part of the 

 tentacles are clasping them. July 12, 10 a.m., nearly 

 all the tentacles are curving towards the bits of apple, 

 but very few of the glands are touching them. 



