Plate LXVII. 



Fig 312. CLADOPHOEA MAGDALENE. 



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 algse. Filaments bent, 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 broad; 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. CLADOPHOKA GATTY^. 



Colour. A dull, dirty olive-green. 



Substance. Rather 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 (endochrome) . Partition-lines {dis- 

 sepiments) 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, en- 

 tangled 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; flUed with light yellow colouring 

 matter (endochrome), never very dense. Partition -lines (dissepijnents) contracted. 



Measurement. Indefinite. 



Fructification. As before. 



Habitat. In pools and ditches of brackish or fresh water. In a fountain-pond in the 

 Montpelier Gardens, Harrowgate. Not uncommon. 



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