Cuar. X.] TRANSMISSION OF MOTOR IMPULSE. 193 
were transmitted with equal force or at an equal rate through 
the blade in all directions, a bit of meat placed at one side 
or at one end of the disc ought to affect equally all the 
tentacles situated at an equal distance from it; but this 
certainly is not the case. Before giving the general results, 
it may be well to describe three or four rather unusual 
cases. 
(1) A minute fragment of a fly was placed on one side of the disc, 
and. after 32 m. seven of the outer tentacles near the fragment were 
inflected: after 10 hrs. several more became so, and after 23 hrs. a 
still greater number; and now the blade of the leaf on this side was 
bent inwards so as to stand up at right angles to the other side. 
Neither the blade of the leaf nor a single tentacle on the opposite side 
was affected ; the line of separation between the two halves extending 
from the footstalk to the apex. The leaf remained in this state for 
three days, and on the fourth day began to re-expand; not a single 
tentacle having been inflected on the opposite side. 
(2) I will here give a case not included in the above thirty-five 
experiments. A small fly was found adhering by its feet to the left 
side of the disc. ‘The tentacles on this side soon closed in and killed 
the fly: and owing probably to its struggle whilst alive, the leaf was 
so much excited that in about 24 hrs. all the tentacles on the opposite 
side became inflected; but as they found no prey, for their glands did 
not reach the fly, they re-expanded in the course of 15 hrs.; the 
tentacles on the left side remaining clasped for several days. 
(3) A bit of meat, rather larger than those commonly used, was 
placed in a medial line at the basal end of the disc, near the footstalk ; 
after 2 hrs, 80 m. some neighbouring tentacles were inflected; after 6 
hrs. the tentacles on both sides of the footstalk, and some way up both 
sides, were moderately inflected; after 8 hrs. the tentacles at the 
further or distal end were more inflected than those on either side ; 
after 23 hrs. the meat was well clasped by all the tentacles, excepting 
by the exterior ones on the two sides. 
(4) Another bit of meat was placed at the opposite or distal end of 
another leaf, with exactly the same relative results. 
(5) A minute bit of meat was placed on one side of the disc; next 
day the neighbouring short tentacles were inflected, as well as in a 
slight degree three or four on the opposite side near the footstalk, On 
the second day these latter tentacles showed signs of re-expanding, 
so I added a fresh bit of meat at nearly the same spot, and after 
two days some of the short tentacles on the opposite side of the disc 
were inflected. As soon as these began to re-expand, I added another 
bit of meat, and next day all the tentacles on the opposite side 
of the disc were inflected towards the meat; whereas we have seen 
that those on the same side were affected by the first bit of meat which 
was given, 
10) 
