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REPORT OF THE COMMISSIONER OF FISH AND FISHERIES. 155
in cavities on the branchlets; cystocarps sessile on the branches, ovoid, with a
distinct terminal carpostome.
Var. FILIFORMIS, Harv., l. c.
Slender, elongate, with longer and less arching branches.
On wharves, sponges, &c., below low-water mark.
Quincy, Mass., Harvey; common from Cape Cod southward.
A common and characteristic species of Long Island Sound, forming very densely branching tufts. The
branches are usually arched backwards and bear secund branchlets which are much constricted at
base. The arrangement of the tetraspores in cavities can easily be seen in fresh or alcoholic specimens,
but not well in pressed plants. It is principally on the authority of Zanardini that our species is united
with his C. uncinata, and as he had plenty of material for comparison his opinion is probably correct.
The Adriatic specimens of C. uncinata which we have examined corresponded better with the var.
filiformis than with the more common secund form of Long Island Sound.
L. ROSEA, (Harv.) Thuret. (Chrysymenia rosea, Harv., Phyc. Brit., Pl. 358 a.—
Chylocladia rosea, Harv., Ner. Am. Bor., Part II, p. 186.)
Fronds rose-colored, compressed, hollow, triangular in outline, main divisions simple
or once or twice forked, one and a half to three inches long, an eighth to a quarter of
an inch broad, tapering at the apex, pinnate with simple or pinnate, opposite,
distichous branchlets, which are much contracted at the base; tetraspores tripartite,
sunk in cavities in the cortex of branches.
On stones and shells in ten fathoms.
Portsmouth, N. H.; Newport, R. I., Harvey; Gay Head, W. G. F.; Northern Europe.
A rare and beautiful species, easily distinguished from the last by being broader and flattened, with
beautifully regular, opposite, distichous pinnæ. As far as we know, the cystocarpic fruit of this species
has never been seen. It is tolerably abundant on shells of Mytilus, in company with Scinaia furcellata,
off Gay Head.
CHAMPIA.
(In honor of M. Deschamps, a French botanist.)
Fronds filamentous, branching, hollow, nodose, formed of one or more layers of
roundish-angular cells with cellular diaphragms at the nodes, traversed internally
by a few longitudinal filaments; tetraspores tripartite, scattered in the cortex;
cystocarps as in Lomentaria.
A small genus, comprising about a dozen species, most of which are tropical or Australian, our species,
C. parvula, being the most widely diffused. The genus resembles Lomentaria very closely in the
cystocarpic fruit. The fronds, however, are not only constricted at the joints, but are nodose throughout,
a diaphragm composed of a single layer of cells extending across the nodes. The tetraspores are not
contained in sunken cavities as in Lomentaria. A section of the cystocarps of C. parvula and L.
uncinata shows the same arrangement of the spores, but in the first-named species the carpogenic cell
is larger and projects further into the conceptacle.