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R**ve fe'iíi.-iiola Jlay.
P l a t e CCCXLI.
ZONARIA PARVULA, Grev.
G e n . C h a r . Root coated with woolly fibres. Froud fiat, ribless, fau-
shaped, eutire or variously cleft, marked with concentric lines; the
cells of the surface radiating. Fructification, roundish or irregular,
scattered sori, bursting through the cuticle of both surfaces of the
frond, consisting, at maturity, of numerous spores, nestling among
jointed threads. Z o n a r i a [Ag.),—from lav,¡, a girdle or zone; because
the frond is usually transversely handed.
Z o n a r i a p a rv u la ; frond procumbent, attached by fibres issuing from its
lower surface, membranaceous, suborbicular, variously lobed; lobes
free, rounded, scarcely marked with concentric lines.
Z o n a r i a p a rv u l a , Grev. Crypt. FI. t. 3 6 0 . J. Ag. Sp. Alg. vol. i. p . 1 0 7 .
Harv, Man. e d . 2 . p . 3 8 .
P a b in a parvula, Grev. Alg. Brit. p. 6 3 . Hook. Br. FI. v o l. ii. p. 2 8 2 . Harv.
Man. e d . 1 . p . 3 1 .
P adina reptans, Crouan.
P a d in e l l a p a rv u l a , Aresch. Fug. vo l. ii. p . 2 6 0 . t . ix . f. 1 - 3 .
A g la io z o n ia p a rv u la , Zanard. Sag. p . 3 8 . Kiitz. Sp. Alg. p . 5 6 6 .
Aglaiozonia reptans, Kiitz. I. c.
Hab . On stones and nullipores near low-water mark, and especially on
nulbpore banks in 4 -1 B fathoms water. Perennial? Summer. Discovered
by Miss Cutler, on sandstone tidal rocks near Sidmouth.
Miltown Malbay, near low-water m ark ; and Ifoundstone, on the
nullipore bank, W. FI. I I. Bute, liev. B . Landsborough. Probably
all round the coast, in deep water.
Geogr. D istk . British and French Atlantic coasts. Baltic Sea. Adriatic.
Desor. Soot ? Fronds procumbent, spreading over the rocks or surface of the
nullipore in chcular patches, like a lichen, closely attached by means of
numerous fibrils or rootlets which issue from all parts of the lower surface;
when young roundish, and slightly lobed, the lobes rounded; as the plant
advances the lobes become elongate, somewhat linear, from a quarter to
half an inch in width, simple or subdichotomously divided, with rounded
a.xils; apices always rounded, and broader than the inferior portion of the
lobe, thus affecting a fan-shaped form. Margin somewhat wavy, free from
the rock. Substance membranaceous, brittle, and not adhering to paper.
Surface reticulated with small cells, which are arranged in slightly radiating
longitudinal lines, the cells at the base of the lobe being small and close-
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