Fig. 281 . CALLITHAMNION DAVIESII. 
Colour. Rose-red. 
Substance. Soft. 
Character of Frond. Very minute tufts of fine, jointed threads {filaments). Filaments very 
much branched. Branches spreading ; curved ; of unequal lengths ; scattered ; 
bearing little clusters of branchlets at their angles of branching (air27s) ; the rest of 
the stems bare. 
Joints. Visible throughout. 
Measurement. One-quarter of an inch, or thereabouts, high. 
Fructification. Only one kind known. Minute, oval, stalked, tetraspores borne on the shortest 
of the clustered branchlets ; single or clustered. 
Habitat. Our coasts generally, but preferring warm stations. Parasitic on Ceramium rubrum 
and other algae ; in pools between tide-marks. Not uncommon. 
Fig. 282 . CALLITHAMNION VIEGATULUM. 
Colour. Rose-red. 
Substance. Soft. 
Character of Frond. Very minute tufts of fine, jointed threads {filaments). Filaments once or 
twice divided ; very upright ; set with secund, rod-like branches ; bearing at each 
joint a short, blunt, bud-like branchlet ; several on one side in succession. 
Joints. Visible throughout. 
Measurement. One-quarter of an inch, or thereabouts, high. 
Fructification. Only one kind known. Minute, oval tetraspores borne on the bud-like branch- 
lets, or in their place at the joints. 
Habitat, Our coasts generally. On Ceramium rubrum and other algae, between tide-marks. 
Not uncommon. 
Fig. 283. CALLITHAMNION PEDICELLATUM. 
Colour. A fine red ; easily given out in fresh water. 
Substance. Soft. 
Character of Frond. Longish tufts of jointed threads {filaments) much branched. Filaments 
as thick as horse-hair, loosely and irregularly divided. Branches furnished with 
short, alternate clusters of branchlets ; sometimes one to each join, talmost ; more or 
less forked and spreading ; their tips very obtuse. 
Joints. Visible throughout, and very pellucid. 
Measurement. From 2 to 8 inches long. 
Fructification. Of two kinds. 1. Minute spores in large oval capsules., single or in pairs; 
sessile on the stems. 2. Oval or pear-shaped, very dark tetraspores, or little colourless 
stalks rising from the angles of branching {axils). 
Habitat. Our shores generally. On rocks and wood-work near low-water mark. Frequent. 
Now Gorynospora pcdicellata. 
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