Ser. RHoDOSPERMEZ. Fam. Ceramiee. 
Puate XXVII. 
WRANGELIA MULTIFIDA, Z 4. 
Gen. Cuan. Frond purplish or rose-red, filamentous, jointed ; filaments 
single-tubed. Fructification of two kinds, on distinct individuals : 
1, ¢etraspores affixed to the inner face of the ramuli (not confined 
to involucres); 2, gelatinous receptacles (favelle) terminatmg the 
branches, surrounded by an involucre, and consisting of several clus- 
ters of pear-shaped spores, compacted together. WRanGELIA (4g.)— 
in honour of Baron von Wrangel, a Swedish naturalist. 
Wraneetta multifida; stems setaceous, pinnate or bipimnate, articulated, 
each joint bearing a pair of opposite, slender, pinnato-multifid, in- 
curved ramuli, or whorled with numerous sub-dichotomous ramul ; 
joints of the stem many times longer than broad. 
WRANGELTA multifida, J. 4y. Alg. Medit. p. 19. Endl. 3rd Suppl. p. 35. 
GRIFFITHSIA multifida, 4g. Syst. Alg. p. 143. Ag. Sp. Alg. vol. ii. p. 133. 
Harv. in Hook. Br. Fl. vol. i. p. 338. Harv. in Mack. Fl. Hib. vol. ii. 
p- 212. Harv. Man. p.102. Wyatt. Alg. Danm. No. 43. McCalla, 
Alg. Hib. No. 1. 
CALLITHAMNION multifidum, Kiitz. Phyc. Gen. p. 373. 
CrRaAmivmM verticillatum, Ducluz. sec. Ag. 
Crramivum Casuarine, D.C. Fl. Gall. Syn. p. 8. 
ConFERVA multifida, Hudson F1. Ang. 596. Sm. £. Bot.t. 1816. Dillw. Conf. 
Syn. p. 75. 
Var. 8, pilifera ; ramuli very long, simple and hair-like. 
GRIFFITHSIA multifida 8. pilifera., 4g.l.¢. Harv. 1. c. 
Has. On the perpendicular sides of deep marine pools near low-water 
mark, under the shade of other Alge. Frequent on the southern 
shores of England ; and west of Ireland. Belfast. Bay, I/r. Thompson. 
‘Jersey, Miss White, Miss Turner. Rare in Scotland?  Saltcoats 
(floating), Miss Margaret Landsborough. 
Groce. Distr. Atlantic coasts of Europe. Rare in the Mediterranean sea. 
Descr. Root accompanied by irregularly branching fibres. Filaments 4-8 
inches high, as thick as hogs’ bristles, generally undivided, but furnished 
throughout their length with lateral, opposite or alternate spreading, disti- 
chous or spirally quadrifarious, simple branches similar to the stem; and 
like it bearing a second or even a third series, which gradually become more 
and more slender. Stem and branches jointed, the articulations very variable 
in length in different specimens, 5-10 times longer than broad, single tubed, 
with a very wide hyaline border, each bearing at a short distance below the 
joint either a pair of slender, opposite pinnato-multifid ramuli (which seems 
to be the normal state of young individuals), or, as shown in our figure, 
H 
