Owap. X. CONDUCTING TISSUES. 249 
(a most powerful stimulant) near the centre of the 
disc above the incision—that is, a little towards the 
apex—with the following results :— 
(1) This leaf proved rather torpid: after 4 hrs. 40 m. (in all 
eases reckoning from the time when the meat was given) the 
tentacles at the distal end were a little inflected, but nowhere 
else; they remained so for three days, and re-expanded on the 
fourth day. The leaf was then dissected, and the trunk, as well 
as the two sublateral branches, were found divided. 
(2) After 4 hrs. 30 m. many of the tentacles at the distal end 
were well inflected. Next day the blade and all the tentacles at 
this end were strongly inflected, and were separated by a dis- 
tinct transverse line from the basal half of the leaf, which was 
not in the least affected. On the third day, however, some of 
the short tentacles on the disc near the base were very slightly 
inflected. The incision was found on dissection to extend across 
the leaf as in the last case. 
(8) After 4 hrs. 30 m. strong inflection of the tentacles at 
the distal end, which during the next two days never extended 
in the least to the basal end. The incision as before, 
(4) This leaf was not observed until 15 hrs. had elapsed, and 
then all the tentacles, except the extreme marginal ones, were 
found equally well inflected all round the leaf. On careful 
examination the spiral vessels of the central trunk were cer- 
tainly divided; but the incision on one side had not passed 
through the fibrous tissue surrounding these vessels, though it 
had passed through the tissue on the other side.* 
The appearance presented by the leaves (2) and (8) 
was very curious, and might be aptly compared with 
that of a man with his backbone broken and lower ex- 
tremities paralysed. Excepting that the line between 
the two halves was here transverse instead of longitu- 
dinal, these leaves were in the same state as some of 
those in the former experiments, with bits of meat 
placed on one side of the disc. The case of leaf (4) 
* M. Ziegler made similar ex- ‘Comptes rendus,’ 1874, p. 1417), 
periments by cutting the spiral but arrived at conclusions widely 
vessels of Drosera intermedia different from mine. 
