242 DROSERA ROTUNDIFOLIA. Cuap. X. 
Shrs. or 9 hrs., and was completed in from 22 hrs. to 
30 hrs. from the time of inflection. After an interval 
of a day or two, raw meat with saliva was placed on the 
discs of these seventeen leaves, and when observed 
next day, seven of the headless tentacles were inflected 
over the meat as closely as the uninjured ones on 
the same leaves; and an eighth headless tentacle 
became inflected after three additional days. The 
meat was removed from one of these leaves, and the 
surface washed with a little stream of water, and after 
three days the headless tentacle re-expanded for the 
second time. These tentacles without glands were, how- 
ever, in a different state from those provided with glands 
and which had absorbed matter from the meat, for the 
protoplasm within the cells of the former had under- 
gone far less aggregation. From these experiments 
with headless tentacles it is certain that the glands 
do not, as far as the motor impulse is concerned, act in 
a reflex manner like the nerve-ganglia of animals. 
But there is another action, namely that of aggrega- 
tion, which in certain cases may be called reflex, and 
it is the only known instance in the vegetable king- 
dom. We should bear in mind that the process does 
not depend on the previous bending of the tentacles, 
as we clearly see when leaves are immersed in certain 
strong solutions. Nor does it depend on increased 
secretion from the glands, and this is shown by several 
facts, more especially by the papille, which do not 
secrete, yet undergoing aggregation, if given carbonate 
of ammonia or an infusion of raw meat. When a gland 
‘is directly stimulated in any way, as by the pressure of 
a minute particle of glass, the protoplasm within the 
cells of the gland first becomes aggregated, then that 
in the cells immediately beneath the gland, and so 
lower and lower down the tentacles to their bases ;—~ 
