244 DROSERA ROTUNDIFOLIA, Ouar. x. 
p. 10). The short tentacles within this ring still 
retain their vertical position, as they likewise do when 
a large object is placed on their glands, or when an 
insect is caught by them. In this latter case we can 
see that the inflection of the short central tentacles 
would be useless, as their glands are already in con- 
tact with their prey. 
The result is very different when a single gland on 
one side of the disc is excited, or a few in a group, 
These send an impulse to 
the surrounding tentacles, 
which do not now bend 
towards the centre of the 
leaf, but to the point 
of excitement. We owe 
this capital observation to 
Nitschke,* and since read- 
ing his paper a few years 
ago, I have repeatedly 
verified it. Ifa minute bit 
of meat be placed by the 
aid of a needle on a single 
gland, or on three or four 
together, halfway between 
the centre and the circum- 
iiecna ecient ference of the disc, the 
Leaf (enlarged) with the tentacles inflected directed movement of the 
i + placed ide of : ; 
over 2 bit of meat placed on onesie’ surrounding tentacles is 
well exhibited. An accu- 
rate drawing of a leaf with meat in this position is 
here reproduced (fig. 10), and we see the tentacles, in- 
eluding some of the exterior ones, accurately directed 
‘to the point where the meat lay. Buta much better 
Fie. 10. 
* ‘Bot. Zeitung,’ 1860, p. 240, 
