Plate LXV. 
Fig. 302. CLADOPHOKA GRACILIS. 
Colo 2 ir, Bright yellow-green. 
Substance. Soft ; silky ; but adhering imperfectly to paper ; fading in the herbarium, but 
retaining its gloss. 
Character of Frond. Dense tufts of jointed threads {filaments)^ very much branched. Fila- 
ments long, slender ; the main ones entangled together, into something of a general 
stem, from wdiich spring very numerous, long, wavy, angularly-twisted branches, 
plentifully clothed with branchlets ; which are much divided and branched ; almost 
tufted ; the last set long, slender, secund^ in rows like the teeth of a comb. 
Joints. From three to five times longer than broad, filled with light-green colouring matter 
{endochrome). 
Measurement. From 6 to 12 inches long. 
Fmctification. Minute seeds {zoos'pores') formed of the colouring matter in the joints, and in 
due time bursting through them. 
Habitat. Our shores generally. On Zostera and the larger algse in from four to six fathoms’ 
water. Not uncommon. 
More luxuriant, more glossy, and more branching than C. flexuosa. Less silky, less 
slender, and less soft than C. Rudolphiana. 
Fig. 303. CLADOPHORA BALLIANA. 
Colour. Grass-green. 
Substance. Soft and tender ; almost gelatinous, closely adhering to paper. 
Character of Frond. Fine tufts of jointed threads {filaments')^ very much branched. Filaments 
extremely slender ; set with long, upright, irregularly alternate branches. Branches 
excessively divided ; the last set upright, rod-like ; clothed with remarkably slender, 
secundj one- or two-jointed branchlets. Tips pointed. 
Joints. Those of the branches eight or ten times longer than broad ; of the branchlets six or 
eight times ; filled with remarkably dense green colouring matter {endochrome). 
Partition-lines {dissepiments) broad and transparent. 
Measurement. From 6 to 8 inches long. 
Fructification. Minute seeds {zoospores) formed of the colouring matter in the joints, and in 
due time bursting through them. 
Habitat, Clontarf. Miss Ball. 
From the enormous length of the joints like no other British Cladoplwra but C. Rudol 
phiana, from which a quite different character of branching separates it. 
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