r
and the apices are seldom so distinctly fastigiate as in that species.
The habitat in which C. uneialis occurs, affords an additional
clue. It usually frequents rocky places, growing on the
rock itself, or among the thin coating of sand which covers it, in
places close to the edge of low-water mark. C. lanosa, on the
contrary, is almost always found as a parasite on other Algse; or
else attached to pieces of wood, and to the leaves of Zostera. To
C. arcta, our C. uneialis has much resemblance; but is a much
smaller plant, with very much more slender filaments.
The root-like fibres, by which the filaments are connected
together, are common to the three species; and if these roots be
considered a character of sufficient importance to define a genus,
Kutzing’s Spongiomorpha, founded on the present plant, ought
to include the three.
Fig. 1. Tufts of C la d o ph o r a u n c ia l is -.— of the
bundled together :— moderately magnified. 3.
highly magnified.
se. 2. Filaments
Portion of a filament:—