P late XXXV. {B).
CODIUM AMPDIBIUM, Moore.
Codium mnpldUum; fronds minute, erect, cylindrical, simple, obtuse,
aggregated in widely spreading strata.
C o d ium am p liib ium , Moore et Harv. in Ann. Nat. Hist. vol. xiii. (1 8 4 4 )
p . 3 2 1 . p i. 6.
H ab. On turf-banks at extreme high-water mark, near Eoundstone, Galway,
Mr. Me’ Calla.
G e o g k . D is t r . West of Ireland.
De s c r . Stratum indefinite, composed of entangled filaments, spreading over the
surface of tlie bog. Fronds rising above the stratum, like papiUie, cylindrical
or clavate, from a line to nearly half an iiicli in height, and from a
quarter-line to more than a line in diameter, erect, distiriot from each other
(not massed together), obtuse, simple; their axis composed of branched,
interwoven, irregular fibres, which throw off to the circumference cluh-
shaped ramuli, of the same nature, and nearly the same form, as those of
C. tomentosum. Colour a brhhant green. Substance soft.
Codium amphibium was discovered by Mr. Me’ Calla in October,
1843, spreading in patches of great extent along the edge of the
sea, over the surface of a turf-bog which meets the shore at
E.oundstone Bay. In this situation the plant is exposed alternately
to the influence of salt and of fresh water, and, it would
appear, is even affected by atmospheric changes: for, its discoverer
has observed, tbat “ in dry weather it loses all its characters,
the frond shrinking to a mere nothing, but on the return of
moisture it immediately gets fresh again” . Specimens will, I
understand, be published in the second volume of M’Calla’s
‘ Algce Hibernicie”.
B. Fig. 1. Co d ium a m p h ib iu m :—natural size. 2. Two of the fronds:—
magnified. 3. Filaments from the same ;—nwre highly magnified.
a