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316 25. Conferva. 1. HYDROPHYTE. PLcelLapL
e. Cotoured, simple, Irittle. Chantransia.
53. Conferva Jasciala.
Banded crowsilk.
Threads simple, slender, slimy, purplish brown ; joints
as long as broad, with a narrow, central, transverse band.
Conferva fasciata, Dillisyn, 23.
On decayed sticks and leaves, in fresh water.
Threads about half an inch long.
54- . Conferva lineaia. Lined crowsilk.
Threads simple, slender, brittle, brown ; joints two or
three times as long as broad, with one or two transverse
lines at uncertain distances from each other ; knots con-
tracted.
Conferva lineata, Dillwyn, 44.
Fragilaria lineata, Lynghye Hydr. Dan. 184,
Leaves of fresh-water plants.
55. Conferva Borreri.
Borrer''s crowsilk.
Threads simple, slender, brittle, palish brown ; joints rather
shorter than broad, combined in pairs ; spores in the
centre of each joint.
Conferva nummuloides, Engl. Bot. 2287.
On marine plants.
Threads short, tortuous, cylindrical, dirty white.—These
three last species, as also c. dissiliens, might be formed
into a very natural genus, bordering upon the diatomidese,
from which they differ by the threads being cylindrical and.
solitary.