taken from one of Miss Warren’s specimens, and it appears to
be identical with wliat I have received from M. Lenormand as
the Halymenia Buhyi of Chauvin. It will be seen that the
frond is considerably different in form from the typical specimens
of K. reniformis, the outline much more approaching
that of Iridcea edulis. Some of Miss Warren’s specimens are
even larger than here represented; but the majority are of less
size. All have very mitch the same general outline; those
gathered at a later period of the year are of a much firmer consistence
and denser substance than the rest. From the Rev. Mr.
Ilore I possess specimens gathered at Plymouth, quite similar to
the Falmouth ones, except that they are split at the apex; a
peculiarity which originated, Mr. liore informs me, after they
had been gathered. I am not quite so certain that the Irish
liabitats given, on Mr. Thompson’s authority, belong to this
species, and not to a variety of K. reniformis, the specimens
which I have seen not being in a sufficiently perfect state to
remove all ambiguity. Should these stations be established, the
merit of having added a new plant to our flora must attach to
Miss Davison; whose specimens are dated so long back as 1833.
Pesides mere form, which is not absolutely to be depended
on, this plant differs from K. reniformis in the duller colour,
in its globules of spores being of a much smaller size, and somewhat
in the structure of the frond. It arrives at maturity, too,
at a much earlier season, being in greatest perfection in March
and April, and becoming much faded and passing into decay in
August; just at the period when the full-grown and strongly
coloured fronds of Kal. reniformis begin to come on shore.
Whether or not that species be perennial, as seems probable,
from the proliferous individuals which are frequently found, the
present is certainly an annual, arriving at maturity and passing
away within six months.
Fig. 1. Kallymenia D ubyi :— of the natural size. 2. Transverse section oi
the frond, and of the favellidia. 3. Fragment, to show the surface cellules.
i . A favellidiiim