Plate L. 
Fig. 224. PEYSSONELIA DUBYl. 
Colour. Brownish -red. 
Substance. Membranaceous. 
Character of Frond. A thin, incrusting expansion, at first simple and circular ; afterwards 
cut into divisions (lobes) ; attached to whatever it grows upon by the whole of its 
under surface, which throws out woolly rootlets. Upper surface marked by rings of 
lines {concentric zones). 
Measurement. From 1 to 2 inches across. 
Fructification. Only one kind known. Tetraspores hidden among radiating threads in wart- 
like prominences. 
Habitat. North of Ireland and west of Scotland. Probably in many places. On old shells, 
stones, &c., on scallop-banks in from ten to fifteen feet water. Not uncommon. 
Fig. 225. GIGARTINA ACICULARIS. 
Colour. A dull, purple-red ; darker when dry. 
Substance. Gristly. 
Character o f Frond. Cylindrical ; wiry ; irregularly branched ; tufted ; of much the same 
thickness throughout, all but the tips, which are remarkably pointed. Stems curved 
or wavy ; simple or forked. Branches curved and re-curved ; wavy ; wide-spreading 
in all directions ; once or twice re-branched. Branchlets short, distant ; either 
alternate, opposite, or forked ; oftenest secund. Boot fibrous. 
Measurement. From 2 to 4 inches long. 
Fructification. Only one kind observed. Clusters of spores in globose capsules ; sessile on the 
branchlets ; often several together. 
Habitat. South coast of England. Jersey. Belfast. On rocks near low-water mark. Bare. 
For other Gigartinas refer back to Plate XLIV. Fig. 201 ; Plate XLIII. Fig. 197 ; and 
Plate XLII. Fig. 194. 
Fig. 226. GINANNIA FURCELLATA. 
Colour. Sometimes a pale pinky, sometimes a dull red, becoming deeper in drying. 
Substance. Membranaceous ; fleshy ; tender. 
Character of Frond. Cylindrical ; the thickness of a goose-quill throughout ; repeatedly and 
regularly forked {dichotomous) from a very short taper stem ; forming a circle when 
spread. Occasional specimens, midribbed ; or sometimes constricted here and there 
as if jointed. Tips obtuse ; broken ones sometimes throwing out fresh frondlets. 
(See figure.) Boot a disc. 
Measurement. From 2 to 6 inches long. Diameter of branches varying greatly up to half an 
inch. 
Fructification. Only one kind known. Globular masses of spores^ immersed in the frond. 
Showing through, when held up to the light 
Habitat. Eastern and southern shores of England. Ireland, all round ; and very fine ; Scilly. 
On rocks, &c. from low-water mark to eight or ten fathoms’ depth. Bare. 
Now/Sdnam furcellata. 
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