water ; but wben the plant grows in a sunny situation the wliole frond,
except the tips and the masses of spores, becomes of a greenish yellow.
Substance gelatinous and tender, closely adhering to paper m drying.
This plant, in many of its characters, resembles the smaller
specimens of C. kaliformis, of which it was formerly considered
to be merely a dwarf variety. But it may generally be known
from all states of that species by its peculiarly bushy, dense
habit, and the alternate disposition of its branches and ramuli ;
and fohen found in fructification the two are clearly distinguished
by the different form of the capsular fruit. The ceramidia of
C. kaliformis are hemispherical ; those of C. parvula are of much
larger size, less abundant, and distinctly conical, with a much
less evident hyaline border. In the present species also, the
articulations of the branches are shorter and more equal than m
a kaliformis-, and those of the main stems never so much distended,
nor of so great a proportionate length.
Chylocladia parvula is found on most of our coasts, and
appears frequent along the Atlantic and Mediterranean shores of
Europe. Along the eastern shore of North America it would
seem to be particularly abundant, as it occurs in almost every
parcel of Algæ wbicb I have received from that country. The
American specimens agree in all essential particulars with the
European ; hut some are much more slender, while others are
more robust than the generality of British individuals. But
there is quite as much difference observable among the latter as
in any of the American forms.
A species found at New Zealand {C. affinis. Hook, et Harv.)
seems almost intermediate between C. kaliformis and C.parvula,
having much of the ramification of one, with the fructification of
the other ; hut it is sufficiently distinct from both.
Fig. 1. C h y lo c la d ia pa r v u l a -.— the natural áse. 2. Branchlets with cera-
° midia. 3. Section of a ceramidium. 4. Spores from the same. 5. Brauch-
lets with tetraspores. 6. A tetraspore -.— all more or U