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2846
ASPEROCOCCUS compressus.
Compressed Asperococcus.
CRYPTO G A M I A Algos Inarticulate.
Gen. C h a r . Frond (simple) tubular, cylindrical or
compressed, continuous, membranaceous. Root
minutely scutate, naked. Fructification ; distinct
spots composed of imbedded seeds mixed with
erect club-shaped filaments.
S p e c . C h a r . Frond flat, thickened at the edffes,
rather short, attenuated at both extremities, here
and there slightly contracted, gelatinous.
Syn. Asperococcus compressus. Hook. Eng. FI.
v. 2. pt. 1. 278. Alg. Damnon. no. 8.
f \ )U N D in Penzance Bay, in April, 1839, by the Rev.
H. Penneck, who kindly supplied fresh specimens for examination.
It has also been found on the Devonshire coast
in several places by Mrs. Griffiths, and near Shoreham,
Sussex, by Mr. Borrer.
Fronds tufted, from 5—10 inches long, springing from a
minute scutate base, much attenuated below, and occasionally
slightly so above, but often of nearly the same breadth
for some distance to the very extremity, which is obtuse.
It is flat, consisting of a double membrane united by a thin
layer of cells. Fructification in scattered spots, consisting
of slightly raised sori of subelliptic spores. The structure
of the membrane is cellular. The cells are often arranged
with great regularity, and contain four granules, as in Te-
traspora : occasionally the cells are less regular, and the
nucleus is undivided. It adheres firmly to paper when dry.