CONFERVACE. 139 
chrome, and about once and a-half as long as broad, and here and there, 
at irregulai intervals, two proximate articulations, longer and broader 
than the rest, form together a spindle-shaped swelling, in which a dark- 
coloured endochrome collects, the mass being darkest and densest where 
the two cells touch each other. This looks like the commencement of 
fructification, but I am unable to say whether a sporangium is ultimately 
formed. These dark-coloured double cells are frequently so numerous 
that they give the filaments, when examined with a pocket lens, a varie- 
gated appearance. Substance membranaceous, and in drying the plant 
scarcely adheres to paper.’—Harvey. 
Plate LIV. fig. 1. Portion of thread of Chaetomorpha litorea X 100 
diam. 
Chetomorpha linum. (foth.) Kutz. Tab. 11, t. 55, f. 3. 
Rather rigid, dark green, or now and then yellowish green 
and less rigid, lower articulations equal or almost equal in 
length to their diameter, upper articulations, before division, 
two or three times as long as the diameter, or even four times, 
here and there swollen. Cell-membrane of the lower articula- 
tions thick, distinctly lamellose, the upper ones thinner and 
indistinctly lamellose, contracted at the joints. 
Sizz. Threads -25 mm. thick. 
Rabh. Alg. Eur, iii:, 327. Harv. Phyc. Britt., t. 150, f. a. 
Conferva linum, Ag. Syst.97. Eng. Bot. ii., t. 2363. 
Conferva capillaris, Huds. Fl. Ang., p. 598. Lightf. Fl. 
Scot. 988. Dillw. Conf., t. 9. 
Conferva crassa, Eng. Fl.v., 252. Mack. Fl. Heb. 225. 
In brackish and salt water. 
‘Filaments from a few inches to several feet in length, twice as thick 
as a hog’s bristle, very much curled, rigid, crisp, and brittle, soon becom- 
ing flaccid if exposed to the air ; lying in thick but not dense bundles, 
of considerable length, disposed in strata, one above the other. Articu- 
lations about as long as broad, filled with granular fluid, which in some 
joints is more dense than in others. Eventually the joints divide in the 
centre by a transverse line, and the mass separates, a new diaphragm is 
then gradually formed, and finally 4 new joint. This species varies 
much in colour, being sometimes of a pale, at other times a dark green, 
and is very often mottled with dark and light green. Substance rigid- 
membraneous, scarcely adhering to paper in drying.”—Harvey. 
Plate LIV. fig. 2. Portion of sterile thread of Chatomorpha linum 
X 100. Fig. 3, portion of fertile thread with zoogonidia X 100. Fig. 4, 
Zoogonidia X 800. 
Chetomorpha sutoria. (Berk.) 
Dark green, crispate, rather rigid, interwoven in lax tufts, 
articulations one and a-half times as long as broad, after 
division shorter than the diameter, cell-membrane thick, dis- 
tinctly lamellose. 
Sizz. Threads ‘01-012 mm. diam. 
Conferva sutoria, Berk. Glean., t. 14, f. 3. Harv. Man. 
128. Phye. Britt., t.150, f. s. 
In brackish ditches, estuaries, and salt water. 
