unar, XVI. CAPTURED INSECTS. 369 
pedicels are multicellular, are longer than elsewLere, 
and bear smaller glands. All the glands secrete a 
colourless fluid, which is so viscid that I have seen a 
fine thread drawn out to a length of 18 inches; but 
the fiuid in this case was secreted by a gland which 
had been excited. The edge of the leaf is translucent, 
and does not bear any glands; and here the spiral 
vessels, proceeding from the midrib, terminate in cells 
marked by a spiral line, somewhat like those within 
the glands of Drosera. 
The roots are short. Three plants were dug up in 
North Wales on June 20, and carefully washed; 
each bore five or six unbranched rocts, the longest of 
which was only 1:2 of an inch. Two rather young 
plants were examined on September 28; these had a 
greater number of roots, namely eight and eighteen, 
all under 1 inch in length, and very little branched. 
I was led to investigate the habits of this plant by 
being told by Mr. W. Marshall that on the mountains 
of Cumberland many insects adhere to the leaves. 
A friend sent me on June 23 thirty-nine leaves from North 
Wales, which were selected owing to objects of some kind ad- 
hering to them. Of these leaves, thirty-two had caught 142 
insects, or on an average 44 per leaf, minute fragments of 
insects not being included. Besides the insects, small leaves 
belonging to four different kinds of plants, those of Hrica tetralia 
being much the commonest, and three minute seedling plants, 
blown by the wind, adhered to nineteen of the leaves. One had 
caught as many as ten leaves of the Erica. Sceds or fruits, 
commonly of Carex and one of Juncus, besides bits of moss 
and other rubbish, likewise adhered to six of the thirty-nine 
leaves. The same friend, on June 27, collected nine plants 
bearing seventy-four leaves, and all of these, with the exception 
of three young leaves, had caught insects; thirty insects were 
counted on one leaf, eighteen on a second, and sixteen on a third. 
Another friend examined on August 22 some plants in Donegal, 
Leland, and found insects on 70 out of 157 leaves; fifteen of 
