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REPORT OF THE COMMISSIONER OF FISH AND FISHERIES. 153
destitute of a midrib and with a ciliated margin. It bears a close resemblance to Caliblepharis ciliata,
Kütz., which is a common European species, and it was introduced. Tinder that name in the Nereis, in
which work Rhodophyllis veprecula was cited on the authority of Agardh. But subsequent observation
and examination of the cystocarpic fruit has shown that the C. ciliata of the Nereis is the same as
Rhodophyllis veprecula, Ag. Gobi states that R. veprecula of Agardh is the Fucus dichotomous of
Lepechin, and he considers that C. ciliata, Kütz., should also be included with it under the name of
Rhodophyllis dichotoma (Lepechin). We have retained the name of Agardh because we only wish to
assert that our plant is a Rhodophyllis already described by Agardh, but do not wish to go so far as to
express an opinion with regard to the identity of the two European plants, since we have never been
able to examine the fruit of C. ciliata in good condition. Our form, as found on the Massachusetts coast,
is well developed and agrees perfectly with specimens collected by Dr. Kjellman in Greenland. The
narrow variety was found by Harvey at Halifax. In Herb. Gray is a narrow specimen from Labrador,
marked Calliblepharis jubata, apparently in Lenormand’s handwriting.
EUTHORA, Ag.
(Derivation uncertain.)
Fronds membranaceous, subdichotomously pinnate, formed internally of large
oblong cells, between which is a network of slender branching filaments with a
cortical layer of small cells; tetraspores cruciate, immersed in the cortex of the
thickened apices; cystocarps external, subspherical, marginal, containing a central
nucleus attached to the walls of the conceptacle composed of tufts of radiating
sporiferous filaments around an ill-defined cellular placenta.
A small genus of only two species, one of which is found in the North Atlantic and the other in the
North Pacific. The structure of the frond in our species is peculiar and is the same as that of the genus
Callophyllis. Between the rather large cells of the interior run small branching filaments, best seen in
longitudinal sections. The genus is separated from Rhodymenia, in which it was formerly included, in
consequence of the peculiar frond and cystocarp. The structure of the latter is not at all well known and
should be studied on our coast, where there is an abundance of material. The conceptacles are small
and are borne on the margin of the frond, and the carpostome is not at all prominent. The arrangement
of the spores is complicated and not easily described. They are arranged in tufts of short filaments,
radiating from a common point, and the different tufts, which are very numerous, apparently surround
a central cellular placenta, not at all sharply defined. At any rate, there is no large carpogenic cell,
either at the center, as in Rhodophyllis, or at the base, as in Rhodymenia, and it is by no means certain
that the genus should be placed in the present suborder.
E. CRISTATA, J. Ag. (Sphærococcus cristatus, C. Ag.—Rhodymenia cristata, Grev.;
Phyc. Brit., Pl. 307.—Callophyllis cristata, Kütz.)
Fronds rosy-red, one to five inches high, membranaceous, flabellately expanded,
main divisions widely spreading, alternate, repeatedly subdivided, upper divisions
alternate, linear, laciniate at the tips, with a fimbriated margin; tetraspores
cruciate, in the thickened tips of the frond; cystocarps small, marginal, nearly
spherical.
On algæ, especially on Laminariæ, in deep water.