Plate XLIIL 
Fig. 195. CYSTOCLONIUM PURPURASCENS. 
Colour, A dull, purplish-red ; becoming redder in fresh water ; pinky towards the tips. 
Substance. When fresh, thick ; fleshy ; semi-transparent and very brittle. When dry, be- 
coming tough, and shrinking considerably. 
Character of Frond. Thread-shaped {filiform)^ long? bushy, excessively branched. Stem 
generally undivided ; bearing long alternate spreading branches tapering to each 
end. Branches either simple or forked, bearing a second and third set of similar 
character. Branchlets many times divided (almost in tufts), scattered both on stem 
and branches ; with very acute tips. Boot fibrous. 
Measurement. From 6 inches to 2 feet long. 
Fructification. Of two kinds. 1. A mass of spores in globose capsules; formed in the branch- 
lets ; swelling them out. 2. Tetraspores imbedded in the lesser branches. 
Habitat. Our coasts generally. On rocks, stones, and algas. Between tide-marks. Very 
common. 
Collectors will do well to accustom themselves to the new name of this plant, Cystoclonium 
purpurascens, as Dr. Harvey has no hesitation in declaring that it was erroneously placed 
among the Hypneas. The name Hypnea is accordingly dropped altogether. 
Fig. 196. GRACILARIA MULTIPARTITA. 
Colour. A dull purplish-red ; becoming redder in fresh water ; pinky towards the tips. 
Substance. When fresh, thick ; fleshy ; semi-transparent and very brittle. When dry, be- 
coming tough, and shrinking considerably. 
Character of Frond. Flat ; narrow ; repeatedly but irregularly forked or divided, from, the 
base ; at one level, as if cut out. Divisions Qacinice) narrow-wedge shape ; their tips 
acute. 
Measurement, From 4 to 12 inches long. 
Fructification. Of two kinds. 1. A mass oi spores in conical, very prominent capsules; 
external ; sessile on the surface of the frond-divisions. 2. Tetraspores imbedded in 
the same. 
Habitat. South coast of England. On rocks, &c. in deep water. Very rare. 
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