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P l a t e CCXIX.
C E R A M I U M D E S L O N G C H A M P I I , Chauv.
G bn . Chak. Frmid fiKform, one-tubed, articulated; the dissepiments
coated witb a stratum of coloured cellules, wbicb sometimes extend
over tbe surface of the articulation. Fructification of two kinds, on
distinct individuals ; 1, tetraspores, either immersed in the ramuli, or
more or less external; 3, sessile, roundish reeeptacks {fa v e lla ),
having a pellucid limbus, containing minute, angular spores, and subtended
by one or more short, involucral ramub. C e e am ium {Roth.),
—from Kupagos, a pitcher, but the fruit is not pitcher-sbaped.
C e e a m iu m Beslongehampii ; filaments subsetaoeous, attenuated upwards,
rigid, irregularly cbobotomous, with or without lateral ramuli ; the
apices straight, spreading; articulations colourless, those of tbe main
stems about tbiioe as long as broad, of tbe branches and ramuli much
shorter; dissepiments opake, scarcely swollen; tetraspores whorled
round tbe joints, prominent; favellæ (?) heaped together,_ bursting
irregularly from the sides of tbe branches, destitute of involucral
ramub.
Ce eamium Deslongcbampii, Chauvin, Alg. Norm. / . Ag. Advers. p. 36.
Wyatt, Alg. Banm,. no. 318. Booh, et Harv. in Bond. Journ. vol. vi. p. 410.
Ce eamium Agardbianum, Griff, in Harv. Man. p. 99.
G ongeoceeas Deslongcbampii, Kiitz. in Linn. 15. p. 735. Phyc. Gen. p. 379.
t.4 6 . f. 1.
H a b . On rocks and stones between tide-marks, and on the smaller Algæ.
Annual. Spring and summer. GeneraUy distributed round the
British coasts. Torquay, Mrs. Grifiiths. Swansea, Mr. B a lfs .
Mine Head, Somerset, Miss Gifford. Ardrossan, Rev. B . Landsborough.
Frith of Forth, B r . Greville. Bebast Bay, M r. Templeton.
Dublin Bay, Miss B a ll. Very abundant at Balbriggan, &c., W .H .H .
Geogk. D is t e . Coast of France. Heligoland, Binder ! Tasmania, Gunn.
D e sc e . Boot discoid, occasionally giving off short fibres. Kronds densely tufted,
from two to four or five inches long, rather thicker than human hair, rigid and
with a rough feel, slightly attenuated upwards, branched in a more or less
regularly dichotomous order, the angles not very patent. Branches much
divided, either naked throughout, or giving off, in greater or less abundance,
short, simple, or forked, lateral ramuli. These ramuli are distributed in a
very irregular manner ; sometimes alternate, more frequently secund. and
often very densely crowded, especially in the upper portion of the frond,
which then becomes very bushy. Sometimes, as represented in fig. 3, the
frond is very much distorted ; the branches spreading at right angles, and
the ramuli variously curved and twisted. Apices of the branches straight
and spreading, subulate. Articulations peUucid, those of the lower part of
the stem about thrice as long as broad, of the branches about eqnallmg
VOL. I I . 2 B
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