Onar. XVL PINGUICULA LUSITANICA. 393 
nor could this have been expected, for even had glands 
existed here, the long bristles would have prevented the 
albumen from coming in contact with them. On both leaves 
the bits were now pushed close to one margin, and in 3 hrs. 
30 m. this became so greatly inflected that the outer surface 
touched the blade; the opposite margin not being in the least 
affected. After three days the margins of both leaves with the 
albumen were still as much inflected as ever, and the glands 
were still secreting copiously. With Pinyuicula vulgaris I have 
never seen inflection lasting so long. : 
(4) Two cubbage seeds, after being soaked for an hour in water, 
were placed near the margin of a leaf, and caused in 8 hrs. 
20 m. increased secretion and incurvation. After 24 hrs. the 
leaf was partially unfolded, but the glands were still secreting 
freely. These began to dry in 48 hrs., and after 72 hrs. were 
almost dry. The two seeds were then placed on damp sand 
under favourable conditions for growth; but they never ger- 
minated, and after a time were found rotten. They had no 
doubt been killed by the secretion. 
(5) Small bits of a spinach laf caused in 1 hr. 20 m. 
increased secretion; and after 3 hrs. 20 m. plain incurvation of 
the margin. The margin was well inflected after 9 hrs. 15 m., 
but after 24 hrs. was almost fully re-expanded. The glands 
in contact with the spinach became dry in 72 hrs. Bits of 
albumen had been placed the day before on the opposite margin 
of this same leaf, as well as on that of a leaf with cabbage 
seeds, and these margins remained closely inflected for 72 hrs., 
showing how much more enduring is the effect of albumen than 
of spinach leaves or cabbage seeds. 
(6) A row of small fragments of glass was laid along one 
margin of a leaf; no effect was produced in 2 hrs. 10 m., but 
after 3 hrs. 25 m. there seemed to be a trace of inflection, and 
this was distinct, though not strongly marked, after 6 hrs. The 
glands in contact with the fragments now secreted more freely 
than before; so that they appear to be more easily excited 
by the pressure of inorganic objects than are the glands of Pin- 
guicula vulgaris. The above slight inflection of the margin had 
not increased after 24 hrs., and the glands were now beginning 
to dry. The surface of a leaf, near the midrib and towards 
the base, was rubbed and scratched for some time, but no 
movement ensued. ‘The long hairs which are situated here 
were treated in the same manner, with uo effect. ‘This latter 
trial was made because I thought that the hairs might perhaps 
be sensitive to a touch, like the filaments of Dionma. 
