Fig. 227, CRUORIA PELLITA. 



Colour. Blood-red. 



Substance. Gelatinous; leather^'-. 



Character of Frond. Skin-like; closely adhering; forming smooth glossy patches, at 

 first circular, afterwards irregular in shape, on the surface of smooth rocks. 

 Composed of minute, densely packed, upright, simple, or nearly simple jointed 

 threads {filaments). 



Measurement. Indefinite, up to 2 inches in diameter. 



Fructification. Only one kind known. Tetras]jores, globular; divided crosswise 

 {cruciate) in the middle of each filament; immersed in an enlarged cell. 



Habitat. On smooth, exposed rocks and stones at high-water mark. Jersey, Miss 

 Turner. Near Gourock on the Clyde, Mr. Roger Kennedy. Very rare. 



Now Petrocelis cruenta, see Appendix of New Species, page 92 under 

 Cruoria pelUta. 



Fig. 228. PHYLLOPHORA PALMETTOIDES. 



Colour. Rosy-pink. 



Substance. Membranaceous; the stem elastic. 



Character of Frond. Flat; ribless; narrow-oblong or wedge-shaped; leafy; expanding 

 from a cylindrical, simple or branched stem. Leaves simple or once-forked; 

 the first always wedge-shaped; bearing leaflets from their surface or tips. 



Measurement. From J an inch to 2 inches long. 



Fructification. Only one kind observed. Tetraspores forming large oval groups 

 (sori); lying across the frond near the tips; immersed in the substance. 



Habitat. South coast of England. On rocks near low-water mark. Rare. 



For other Phyllophoras see Plate XLV. 



Fig. 229. CROUANIA ATTENUATA. 



Colour. Brownish or purplish-red, fading to a dusty pink. 

 Substance. Gelatinous. 



Character of Frond. Slender; thread-like {filamentous); jointed; much branched. 

 Main divisions partly forked {dichotomous) ; branches alternate; more or 

 less re-branched; the joints clothed all round {whorled) with very short, 

 delicate, many-times-divided branchletde^^5 {rafnelli). 



3Ieasurement. One or 2 inches long. 



Fructification. Only one kind observed in England. Large oval tetraspores in 

 transparent cells; seated on the whorled branchlets, either in pairs, or all 

 round. 



Habitat. South coast of England. Parasitical on smaller algae. Very rare. 



26 



