but I have seen two or three
other sorts of flies thus arrested by the plant. Aug. 12, 1788."

P. 18. _Additional note on Ilex_. The efficient cause which renders the
hollies prickly in Needwood Forest only as high as the animals can reach
them, may arise from the lower branches being constantly cropped by them,
and thus shoot forth more luxuriant foliage: it is probable the shears in
garden-hollies may produce the same effect, which is equally curious, as
prickles are not thus produced on other plants.

P. 41. _Additional note on Ulva_. M. Hubert made some observations on the
air contained in the cavities of the bambou. The stems of these canes
were from 40 to 50 feet in height, and 4 or 5 inches in diameter, and
might contain about 30 pints of elastic air. He cut a bambou, and
introduced a lighted candle into the cavity, which was extinguished
immediately on its entrance. He tried this about 60 times in a cavity of
the bambou, containing about two pints. He introduced mice at different
times into these cavities, which seemed to be somewhat affected, but soon
recovered their agility. The stem of the bambou is not hollow till it
rises more than one foot from the earth; the divisions between the
cavities are convex downwards. Observ. sur la Physique par M. Rozier,
l. 33. p. 130.

P. 65. _Additional note on Gossypium_.

--------emerging Naiads cull
From leathery pods the vegetable wool.
----_eam circum Milesia vellera nymphae
Carpebant, hyali saturo fucata colore_.
Virg. Georg. IV. 334.

P. 119. _Addition to Orchis_. The two following lines were by mistake
omitted; they were to have been inserted after l. 282, p. 119.

Saw on his helm, her virgin hands inwove,
Bright stars of gold, and mystic knots of love;

P. 136. _Addition to the note on Tropaeolum_. In Sweden a very curious
phenomenon has been observed on certain flowers, by M. Haggren,
Lecturer in Natural History. One evening be perceived a faint flash of
light repeatedly dart from a Marigold; surprized at such an uncommon
appearance, he resolved to examine it with attention; and, to be assured
that it was no deception of the eye, he placed a man near him, with
orders to make a signal at the moment when he observed the light. They
both saw it constantly at the same moment.

The light was most brilliant on Marigolds, of an orange or flame colour;