Plate LVIII. 



Fig. 266, CALLITHAMNION TURNERI. 



Colour. A fine rose-red. 

 Substance. Soft but firm. 



Character of Frond. Dense round tufts of jointed threads {filaments) risin^^ from 

 creeping fibres; branched. Stems upright; simple or slightly branched; once 

 or twice plumed like a feather {pinnate), with short opposite branchlets (see 

 magnified bit), very regularly arranged; the lowermost rather the longest, 

 gradually diminishing upwards. 



Joints. Visible throughout. 



Measurement. From an inch to Ij long. 



Fructification. Of two kinds. 1. Minute spores in stalked, oval capsules, borne on 

 the branchlets enfolded by brauchlet)?^;?^ {involucrated). 2. Globose tetraspores^ 

 either stalked or sessile, clustered or solitary, on the inner sides of the 

 branchlets. 



Habitat. Our coasts generally. Parasitic on several algse between tide-marks. 

 Common. 



Fig. 267. CALLITHAMNION PLUMA. 



Colour. Crimson. 

 Substance. Soft. 



Character of Frond. Dense, very short tufts of jointed threads {filaments) rising 

 from creeping fibres; sparingly branched. Stems upright; simple or slightly 

 branched. Branches naked below, the upper half plumed like a feather, with 

 short or long, very upright, close-set branchlets. 



Joints. Visible throughout. 



Measurement. One-quarter to J an inch high. 



Fructification. Only one kind observed. Globose tetraspores, stalked or sessile; 



clustered or solitary; often at the tips of the branchlets. 

 Habitat. The warm stations on our coasts. Jersey. Miltown Malbay. Bantry 



Bay, &c. Parasitic on other algse; generally on the stems of Laminaria 



digitata. Rare. 



Fig. 268. CALLITHAMNION HOOKERI. 



Colour. A brownish or rosy-red; the two tints often found on the same specimen. 

 Substance. Soft. 



Character of Frond. Thread-like {filamentous) ; jointed ; single or tufted. Stem as 

 thick as a hog's bristle; closely furnished throughout with long, alternate, 

 simple branches, which again bear a second or third set; sometimes springing 

 from all sides of the stem; all set with very wide-spread branchlets, plumed 

 like feathers; these re-branchleted with a second very short horizontal set. 



Joints. Distinct only in the lesser branches and the branchlets. 



Measurement. From 1 to 3 inches long. 



Fructification. Of two kinds. 1. Minute spores in large oval capsules; sessile here 

 and there on the branches. 2. Globose tetraspores; sessile along the inner 

 sides of the branchlets near the base; either single or two or three together. 



Habitat. Our coasts generally. On rocks and alga3 between tide-marks. Not 

 uncommon. 



A rather woolly variety of this variable plant was once considered a separate 

 species ; G. lanosum. 



41 * G 



