Ser. RHoDOSPERME. Fam. Ceramiee. 
Puate XLVI. 
SPYRIDIA FILAMENTOSA, Zar. 
Gen. Cuar. Frond fihform, cylindrical, much branched, traversed by a 
wide articulated tube, whose walls are composed of small, angular 
cells; ramuli setiform, simple, jomted. ructification of two kinds 
_ on distinct individuals ; 1, external ¢e¢raspores, with colourless borders, 
attached to the ramul; 2, stalked, gelatinous, lobed receptacles (fa- 
velle), involucred by short ramuli, and containing two or three dis- 
tinct masses of roundish spores. Spyripia (Harv.)—from o7mupis, a 
basket. 
Spyripia ji/amentosa; frond irregularly branched, subopake; branches 
tapering at the base, more or less densely clothed with setaceous 
ramuli; jomts of the stem very short, of the ramuli once and a half 
as long as broad. 
Sprrip1a filamentosa, Harv. in Hook. Br. Fl. vol.ii. p.337. Wyatt, Alg.Danm. 
no. 88. Harv. Man. p.101. J. Ag. Alg. Medit. p. 79. Endl. 3rd. Suppl. 
p-35. Kitz. Phyc. Gen. p.376. t.48. Mont. Pl. Cell. Canar. p. 174. 
SpyRip14 crassiuscula, Kitz. Phyc. Gen. p. 376. 
Sprgipia setacea, Kitz. 1. c. 
SPYRIDIA nudiuscula, Kutz. 7. c. 
Fucvs filamentosus, Wulf. Cr. dq. p. 64. 
Fucus friabilis, Clem. Ess. p. 318. 
CERaMIvM filamentosum, 4g. Sp. Alg. vol.i. p. 141. 
Hourcuinsta filamentosa, 4g. Syst. p. 159. 
_ Conrerva Griffithsiana, #. Bot. t. 2312. 
Has. On submarine rocks, near low-water mark. Perennial, Summer. 
Southern coasts of England, in several places ; but rare. Southampton, 
Miss Biddulph. Torquay and Sidmouth, Mrs. Griffiths. Jersey, 
Miss White; Miss Turner. Aberfraw, Anglesea, plentiful; and 
Holyhead, Mr. Ralf. 
Groer. Distr. Atlantic coasts of Europe from England to Spain. Abundant 
in the Mediterranean. East and West Indies. Canary Islands. Australia 
and Tasmania, 
Descr. Root a large disc-like expansion, half an inch or more in diameter. Stems 
tufted, many springing from the same base, from two to ten inches high, 
about half a line in diameter below, gradually attenuated upwards irregu- 
larly branched in a manner between dichotomous and alternate. In some 
specimens, an undivided stem, six to eight inches long, is densely beset 
with lateral branches spreading nearly horizontally, and diminishing in 
length as they approach the apex ; the lowest being three to four inches 
