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REPORT OF THE COMMISSIONER OF FISH AND FISHERIES. 113
occurs at Charleston but is not known farther north, is also to be included in the present genus, then
the definition given above will have to be modified so as to include plants having more than one row of
cells, an extension of the genus apparently adopted by Thuret, but not originally adopted by Areschoug.
E. CERAMICOLA, (Lyngb.) Aresch. (Bangia ceramicola, Chauvin; Phyc. Brit., Pl.
317.—E. ceramicola, Le Jolis, Liste des Algues Marines de Cherbourg, Pl. 3, Figs. 1,
2.)
Filaments diffuse, forming a web or fringe on algæ, cells about as long as broad.
On algæ, especially the smaller Florideæ, in tide-pools. Late summer and autumn.
Gloucester, Mass., Mrs. Davis, Mrs. Cochrane; Peak’s Island, Maine, W. G. F.;
Europe.
In examining with the microscope the filamentous Florideæ one often meets with a few filaments of this
species. It is not, however, common to find it in such abundance on the shore as to attract the eye of the
collector who is not especially in search of it. It attains its full size in the month of September.
? GONIOTRICHUM, Kütz.
(From γωνια [gonia], an angle, and τριχιον [trichion], a small hair.)
Fronds filamentous, branching, composed of rose-colored, disk-shaped cells,
embedded in jelly.
A genus composed of only two or three species. Kützing describes two species, but his limitation of them
is not now kept by algologists. Zanardini describes and figures a G. cœrulescens, which is not red in any
sense. The systematic position of the genus is very doubtful, and were it not for the color of the cells, G.
elegans would probably be placed in the Nostochineæ. The only reproduction known consists in the
escape of the cells from the gelatinous sheath and a division into two new cells, then into four, and so
on until a new filament is formed.
G. ELEGANS, Zanard. (Bangia elegans, Chauv.; Phyc. Brit., Pl. 246.) Filaments about
.02 mm in diameter; cells cuboidal or ovate, about .009-10 mm in diameter.
On Dasya elegans.
Cotuit Port, Mass., Mrs. J. T. Lusk; Europe.
A small and rare plant, growing in tufts scarcely a tenth of an inch high. We have only one American
specimen, collected by Mrs. Lusk, of Gloucester. The locality was incorrectly given in the List of the
Marine Algæ of the United States, Proc. Am. Acad., 1875, the specimen not having been found by Mrs.
Lusk at Gloucester, font at Cotuit, Mass.
SUBORDER SQUAMARIEÆ.
Fronds forming horizontally expanded crusts, usually membranaceous, occasionally
somewhat incrusted with lime, composed of closely packed vertical filaments arising
from a horizontal stratum of cells; fructification either in external protuberances
composed of parallel filaments S. Miss. 59——8