Plate XXXI. 



Fig. 137. DASYA OCELLATA. 



Colour. A brownish or bright purple. 

 Substance. Kigid for so small a plant; spongy. 



Character of Frond. A delicate little bush; tufted. Stems simple or nearly so; as 

 thick as hogs' bristles; opaque; unjointed; marked with veiny lines; densely 

 clothed all round with short fringing branchlets which are specially crowded 

 above, making all the tips strikingly round and blunt. Branchlets slender, erect, 

 several times forked; jointed throughout. 



Measurement. One or 2 inches high. 



Fructification. Only one kind found in England; viz. tetraspores, in long, slender, 

 pointed sticliidia. 



Halitat. South of England and Ireland. On mud-covered rocks near low-water 

 mark, liare. 



Fig. 138. CHYLOCLADIA EEFLEXA. 



Colour. Purple or dull red. 



Substance. Soft, membranaceous- not distinctly gelatinous. 



Character of Frond. Small; creeping; oddly bent and branched. Lower branches 

 cylindrical, slender, arched, tubular; attaching themselves to the rock, by tiny 

 branchlets, tipped with discs. Secondary branches sj^ringing from the arched 

 ones; very irregularly placed (sometimes three from one point), tapering at 

 both ends; contracted at intervals as if drawn in; the joints so formed about 

 once and a half as long as broad; sometimes bearing a few scattered, curved 

 branchlets. 



Measurement. Two or 3 inches high. 



Fructification. Of two kinds. 1. Clustered sjyores in globose, unstalked (sessile) 

 capsules; external. 2. Tetraspores immersed in the smaller branches. 



Habitat. South and west coasts of England; Ireland, generally. On rocks near low- 

 water mark. 



Now Lomentaria refiexa. Dr. Harvey considers this a variety of C. Kalifonnis. 



Fig. 139. BOSTRYCHIA SCORPIOIDES. 



Colour. Dull purple, becoming blackish in drying. 

 Substance. Elastic; but tender. 



Character of Frond. Entangled tufts of slender threads {filaments), whose tips are 

 more or less tightly curled in (like those of a young fern); very much 

 branched. Branches very wide-spread; wavy; furnished with a second or third 

 set, equally spreading; the uppermost with their tips turned in {involute). 

 The whole frond set, at intervals, with short, many -times-divided branchlets; 

 almost horizontally spread. 



Measurement. Four or 5 inches high. 



Fructification. Only one kind observed in England; viz. Tetraspores in lanceolate 

 sticliidia; external; borne either on the sides or ends of the branches. Very 

 rarely found. 



Habitat. Certain stations only on our coasts. Muddy sea-shores, near high-water 

 mark; at the estuaries of rivers; in salt-water marshes and ditches, adhering 

 to the I'oots of flowering plants; said also to grow on submarine rocks. Very 

 local; therefore rare. 



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