Plate LXVII. 
Fig. 312. CLADOPHOEA MAGDALEN.^. 
Colour. A dark, dingy green. 
Substance, Somewhat rigid ; not adhering to paper in drying. 
Character of Frond, Short, hair-like ; jointed threads {filaments) matted together ; entangled 
among the bases of other algae. Filaments hent, straggling, almost distorted, 
irregularly forked ; with very wide angles of branching (axils). Branches curved ; 
wide-spread ; set with a few forked or secund branchlets, which are quite as thick as 
the stems whence they spring. 
Joints. Three or four times longer than hroad ; filled with very dense, dark-green colouring 
matter (endoclirome) ; the partition-lines (dissepiments) very narrow ; not contracted. 
Measurement. One inch long. 
Fructification. Minute seeds (zoospores) formed of the colouring matter in the joints, and in 
due time bursting through them. 
Habitat. Jersey. One specimen. 
Fig. 313. CLADOPHOEA GATTY..®. 
Colour. A dull, dirty olive-green. 
Substance. Bather rigid ; not adhering to paper. 
Character of Frond. Short jointed threads (filaments) densely matted together in ropy tufts. 
Filaments coarsely hair-like ; irregularly branched ; somewhat forked ; set with a 
few simple, wide-spread branchlets. Angles of branching (axils) rounded. 
Joints. About once and a half as long as broad ; very uniform throughout ; filled with dull 
green or olive colouring matter (endoclirome). Partition-lines (dissepiments) very 
narrow ; contracted. 
Measurement. One inch long. 
Fructification. As before. 
Habitat. Uncertain between Hastings and Filey. One specimen. 
Fig. 314. CLADOPHOEA FLAVESCENS. 
Colour. Pale yellow ; glossy when dry. 
Substance. Soft ; silky ; not adhering to paper. 
Character of Frond. Very slender jointed threads (filaments) growing in long, entangled tufts 
in pools and ditches, where it rises at last to the surface, forming a floating fleece 
intermixed with large air-bubbles. Filaments sparingly branched in a partly forked, 
partly alternate manner. Branches long, upright, wide-spread ; set with scattered, 
alternate, or secund branchlets. 
Joints. Eight or nine times longer than broad ; filled with light yellow colouring matter 
(endochrome)^ never very dense. Partition-lines (dissepiments) contracted. 
Measurement. Indefinite. 
Fructification. As before. 
Habitat. In pools and ditches of brackish or fresh water. In a fountain-pond in the Mont- 
pelier Gardens, Harrowgate. Not uncommon. 
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