Ser. RHoposPrrMex. Fam. Ceramiea. 
Piate CXLIV. 
CERAMIUM FLABELLIGERUM, J 4. 
Gen. Cuan. Frond filiform, one-tubed, articulated; the dissepiments 
coated with a stratum of coloured cellules, which sometimes extend 
over the surface of the articulation. Fructification of two kinds, on 
distinct individuals; 1, ¢etraspores, either immersed in the ramuli or 
more or less external; 2, sessile, roundish receptacles (favella), 
having a pellucid limbus, containing minute, angular spores, and 
subtended by one or more short, involucral ramuli.—Crramium 
(Roth), from xepapos, a pitcher, but the fruit is not pitcher-shaped. 
Crramium flabelligerum; frond subsetaceous, attenuated upwards, rigid, 
flabellately branched, irregularly dichotomous, with lateral forked 
ramuli, the apices acute, patent or somewhat incurved ; articulations 
coated with coloured cellules, those of the lower branches about twice 
as long as broad, of the upper equal in length and breadth, each 
armed on the outer edge with a single, minute, subulate, coloured, 
three-jointed prickle ; tetraspores erumpent, whorled round the joint ; 
favellee two- or three-lobed, berry-like, subtended by several patent, 
subulate ramuli. 
CERAMIUM flabelligerum, J. Ay. Advers. 27. 
Has. Parasitical on the smaller Alge between tide marks. Annual. 
Summer and Autumn. Rare. Torbay, Mrs. Griffiths. Jersey, 
Miss. H. M. White. 
Guoer. Distr. South of England. Coast of Spain; at Cadiz, Cabrera. 
Descr. Fronds more or less densely tufted, but not matted together, from two 
to three inches high, nearly as thick as hogs’ bristle below, becoming gra- 
dually more slender upwards, and towards the apex as fine as human hair, 
’ divided in an irregularly dichotomous manner, distichous, the main divisions 
having a more or less fan-shaped outline, but not strictly fastigiate, re- 
peatedly forked; the upper branches furnished with more or less numerous, 
minute, simple or forked, lateral ramuli from one to two lines in length, 
erecto-patent, somewhat constricted at base, acute and attenuate at the 
point. 4zils patent in all parts of the frond. -4pices generally spreading, 
sometimes slightly incurved, but never hooked inwards. Articulations 
tolerably uniform, those of the lower part of thestem from once and a half 
to twice as long as broad, of the upper branches and ramuli about equal in 
; length and breadth, all coated with a stratum of minute, coloured cells, 
opake, slightly contracted at the dissepiment and there furnished on the 
outer margin with a single, minute, horizontally patent, subulate, three- 
jointed prickle. Tetraspores large, tri-partite, with wide pericarps, erum- 
pent, whorled round the joints. Favelle dispersed along the sides of the 
upper branches, consisting of two or more rounded, berry-like lobes, with 
G2 
