Ser. RuoposperMEm. Fam. Spharococcoidea. 
Priate CXXI. 
RHODYMENIA LACINIATA, Grev. 
Gey. Cuan. yond flat, membranaceous, or subcoriaceous, ribless, veinless, 
cellular; central cells of small. size; those of the surface minute. 
Fructification of two kinds, on distinct individuals; 1, convex ¢uder- 
cles (coccidia), having a thick, cellular pericarp, and contaming a 
mass of minute spores, on a central placenta; 2, ¢e¢raspores, either 
zoned or tripartite, imbedded among the cells of the surface, scattered, 
or forming cloudy patches. . Raopymenia (Gev.),—from podos, red, 
and tpn, a membrane: 
Ruopymenta faciniata; frond thickish, sub-eartilaginous, opake, bright 
red, more or less palmate or flabelliform, cleft: into numerous, broad, 
wedge-shaped segments, which are again divided in a subdichotomous 
manner; the apices obtuse; the margin, when in fructification curled 
and fringed with minute cil, in which the tubercles are imbedded. 
RuopyMENIA laciniata, Grev. Alg. Brit. p. 86. Hook. Br. Fl. vol. ii. p. 289. 
Harv. in Mack. Fl. Hib. part 3. p. 194. Wyatt, Alg. Danm. no. 17. Harv. 
Man. p.60. Endl. 3rd Suppl. p. 51. 
Deesserta lacimata, Grev. Fl. Edin. p. 293. Hook. in Fl. Lond., New 
Series, no. 198. 
Devesserta ciliaris, Lamour. Ess. p. 37. 
CaLOPHYLLIS laciniata, Avitz. Phyc. Gen. p. 401. 
Hatymenta ciliaris, Gail. Dict. Sc. Nat. v. 53. p. 360. 
Spumrococcvts laciniatus, Lyng. Hyd. Dan. p. 12. t. 4. Ag. Sp. Alg. vol. i. 
p: 297. Ag. Syst. p. 230. Hook. Fl. Scot. part 2. p.103. Spreng. Syst. 
Veg. vol. iv. p. 334. ; 
Fucus laciniatus, Huds. Fl. Ang. p.579. Lightf. Fl. Scot. p. 947. Sin. B. 
Bot. t.1068. Turn. Syn. Fue. p. 161. Turn. Hist. t. 69. Esp. Ic. Fue. 
t. 140. } 
Fucus crispatus, Stack. Ner. Brit. t. 15. 
Fucus miniatus, FZ. Dan. t. 769. 
Fucus crispus, Hsp. Ic. Fuc. t. 18. 
Has. On rocks and stones in the sea, and on Laminaria; rarely within 
tide mark. Biennial. January to July. Frequent on the British 
shores, from Orkney to Cornwall. Common in Ireland. Jersey. 
Grocer. Distr. Atlantic shores of Europe from Norway to Spain. Abundant 
in the Foeroe Islands. Eastern coasts of North America, as far south as 
Delaware. 
Duscr. Root minute, discoid. Fronds tufted, from three to ten inches long, 
with a short flattish stem, which soon expands into the cuneate base of the 
frond, cloven into numerous principal segments, all of which are narrow, 
and wedge-shaped below, gradually wider upwards, and are more or less 
parted into lacinie, by vertical clefts. In some varieties the segments 
are three or four inches broad, and very little divided, except at the supe- 
rior margin, which presents a rounded outline, and is parted into nume- 
