P l a t e LXXVIII.
HIMANTHALIA LORLA, Lyngb.
G e n . C h a e . Frond top-shaped. Receptacles very long, strap-shaped, re peatedly
forked, springing from th e centre of th e frond, filled with
mucus traversed by jointed fibres, and pierced by numerous pores,
which communicate with immersed spherical conceptacles, containing
either parietal spores, or (in distinct individuals) antheridia. H im a n t
h a l ia [L y n g h )— from ijias, a strap, and dáXos, a branch (or oXs, th e
sea.)
H im a n t h .a l ia lorea; frond top-shaped, a t length cup-shaped, sta lk e d ; receptacles
repeatedly dichotomous, tapering more or less at th e apex.
H imanthalia lorea, Lyugb. Hyd. Dan. p. 36. t. 8. Ch-ev. Ft. Fdin. p. 285.
Gain, in Diet. Sc. Nat. vol. 53. p. 357. Grev. Alg. Brit. p. 20. t. 3. Hook.
Br. FI. vol, Ü. p. 269. Wyatt, Alg. Damn. no. 3. Harv. in Mack. FI. Hib.
part 3. p. 170. Harv. Man. p. 22. Kiitz. Phyc. Gm. p. 351. Endl. 3rd
Suppl. p. 29.
F u cu s loreus, Linn. Syst. Nat. vol. ii. p. 716. Gm. vol. ii. p. 1382. Hnds.
FI. Ang. p. 583. Lightf. FI. Scot. p. 920. FI. Dan. t. 710. With. Ar.
vol. iv. p. 96. Stack. Ner. Brit.-p. 31. F. B ot.t.5 6% . Turn. Syu.
Fuc. vol. ii. p. 246. Hist. t. 196. Lamour. Fss. p. 19. Ag. Sp. Alg.
vol. i. p. 98. Ag. Syst. p. 280. Spreng. Syst. Veg. vol. iv. p. 316.
F u cu s elongatus, Linn. Sp. Bl. vol. ii. p. 1627 (excl. syn. Moris). Syst.
vol. ii. p. 716. Gm. vol. Ü. p. 1381. Gm. Hist. Fuc. p. 103. (excl. syn.
Huds.).
F u c u s longo angusto crassoque folio, Baii. Syn. p. 43. n. 11.
Fu ous fungís affinis, Raii. I. c. p. 43. n. 15.
H ab. On rocky sea shores, near low water mark. An n u a l? W in te r and
spring. Common.
Geoge. Distk. Atlantic shores of Europe from Iceland (Mohr.) to Portugal
(Broiero). Eastern coast of North America.
D e s o k . Root scutate Fronds tufted, when young nan-ow obconical, gradually
becoming rvider above, and finally being top-shaped, depressed in the
centre, with an expanded circular rim, thus becoming slightly cup-sbaped,
or pezizmform. Receptacles springing from tbe centre (i.e. tbe apex) of tbe
cup-like frond, varying in length from two to ten, or according to some
authors, to twenty feet; from a quarter to half an inch in width, compressed,
linear, repeatedly dichotomous, tapering at the apices into more or less
acute points. Internally these receptacles are fiUed with a ivatery gelatine
traversed by confervoid filaments. Their outer coat is firmly cellular, and
pierced by numerous pores beneath each of wbicb is formed a small spherical
chamber or conceptacle. Tbe fructification is diceeious. In some
individuals tbe conceptacles contain tufts of antheridia, attached to branching
filaments, similar to those of Fucus. In others they contain, immersed