but have reason to believe it subsequent to tlie publication of the
Englisii station. Mr. Mc’Calla was the first to detect it on the
Irish coast, in the year 1840, and to him we owe the knowledge
of its occurrence in plenty in Roundstone Bay, county of Galway.
He describes it as covering the bottom of the bay in wide spreading
strata, at a considerable depth for an individual of this genus,
and as being, towards the close of the summer, washed up in
very large quantity, so as to be carted off by the country people
for manui’e. This will sound strangely in the ear of an English
botanist accustomed to save the minutest scrap as a prize, or to
spend hours in the disentangling of a specimen rolled together
by the waves; but Mr. Mc’Calla’s statement is confirmed by our
friend Mr. Andrews, who observed it cast up in similar abundance
at Arran.
No species can be more distinct. The very patent, opposite
branches, and the invariably opposite, distichous, horizontal ramuli
are its peculiar characteristics. It is most nearly related to C. Hut-
chinsicB and C. diffusa, of which it has the size, rigidity, and something
of the habit. But the opposite ramuli clearly separate it
from either. Both the varieties represented in our plate are
from Roundstone Bay.
I cannot find that it has been noticed in any continental
work. The name, given by Chauvin, under which it was received
from M. Lenormand by Mr. Berkeley, does not appear to
have been published, and this is the only continental authority
which I have been able to ascertain for the species.
Fig. 1, C l a d o ph o r a r e c ia n g d l a r is , var.-a :—natural size. 2. Portion of
tlie same:—magmjied. 3. Var. /3;—natural size. 4. Portion of the same:—
magiiijied.