Onar. I. ACTION OF THE PARTS, 11 
solution is at all strong, the leaf is paralysed), all the 
exterior tentacles bend inwards (see fig. 4), excepting 
those near the centre, which remain upright ; but these 
bend towards any exciting object placed on one side 
of the disc, as shown in fig. 5. The glands in fig. 4 
may be seen to forma dark ring round the centre ; and 
this follows from the exterior tentacles increasing in 
length in due proportion, as they stand nearer to the 
circumference. 
The kind of inflection which the tentacles undergo 
is best shown when the gland of one of the long exterior 
a 
Fie. 6. 
(Drosera rotundifolia.) 
Diagram showing one of the exterior tentacles closely inflected ; the two adjoining 
ones in their ordinary position. 
tentacles is in any way excited; for the surrounding 
ones remain unaffected. In the accompanying outline 
(fig. 6) we see one tentacle, on which a particle of 
meat had been placed, thus bent towards the centre of 
the leaf, with two others retaining their original 
position. A gland may be excited by being simply 
touched three or four times, or by prolonged contact 
with organic or inorganic objects, and various fluids. I 
have distinctly seen, through a lens, a tentacle begin- 
ning to bend in ten seconds, after an object had been 
