■WH.H.dfleilitK, Eeevs EerihAiTL & Reavc, -byi.
P l a t e CXCIV.
ASPEROCOCCUS ECHINATES, Grev.
G e n . C h a r . Frond u n b ra n c h ed , tu b u la r, cy lm d iic a l, or ra re ly compressed,
c o n tin u o u s , m embrana ceous. Fructification s c a tte re d over th e whole
fro n d , in m in u te , d is tin c t dots (sori) composed of ro u n d ish , p rom in en t
spores, m ix ed w ith c lu b -sh ap ed filaments. A sp b ro c o o o u s [Lamour.),
c o rru p tly fo rm ed from asper, rough, a n d kokkos, a f m i t o r seed.
A sperococcus echinatus-, fro n d cylindrical, o b tu se, o r a cu te, m u c h and
g ra d u a lly a tte n u a te d to th e base.
A s p e r o c o c c u s echinatus, Qrev. Alg. Brit. p. 50. t. 9. Harv. Man. 36.
" ” " ’ " tl. p. 36.
Asperococcus fistulosus, Hook. Br. M. vol.ii. p. 377. Wyatt, Alg. Banm.
no. 7. Harv. in Mack. M. Hib. part 3. p. 175.
Asperococcus rugosus, Lamour. Ess. p. 63.
E ncoelium ecliinatum, Ag. Sp. Alg. vol. i. p. 145. Ag. Syst. p. 361. Spreng.
Syst. Feg. vol. iv. p. 338. Kiitz. Phyc. Gen. p. 336.
E ncoelium Lyngbyanum, Grev. Orypt. t. 390.
ScYiosiPiiON fistulosus, Lyngb. Hyd. Ban. p. 66.
ScYTOSiPHON filum, var. fistulosum, Ag. Sp. vol. i. p. 163. Ag. Syst. p. 358.
U lva fistulosa, Huds. Fl. Ang. p. 569. E. Bot. t. 643. Hook. Fl. Scot.
part 2. p. 93.
Conperva fistula, Roth, Cat. Bot. vol. iii. p. 169.
V a r. (3. fro n d setaceous, filiform, tw isted .
A sperococcus echinatus, S- vermicularis, Harv. Man. p. 35.
A sperococcus vermicularis, Moore, Ord. Surv. Londonderry, Bot. p. 9.
Wyatt, Alg. Banm. no. 307.
H a b . On stones, &c., between tide marks. Annual. Summer and autumn.
Common on the British shores.
Geogb. D is t r . Atlantic coasts of Europe and America. Southern Ocean, at
Lord Auckland’s Islands, Br. Hooker.
D esc r . Root, a small disc. Fronds densely tufted, from twenty to a hundred
growing from nearly the same point, varying from two inches to two feet
in length, and from half a Une to half an inch in diameter, very much and
very gradually attenuated at the base, and more or less tapering upwards,
sometimes ending abruptly in a blunt point, sometimes acute, and much
drawn out, cylindrical, bag-like, here and there irregularly somewhat narrowed,
or slightly constricted. Fructification densely sprinkled over the
whole frond, forming minute, prominent, rough dots, composed of densely
packed, vertical filaments, among which the spores are concealed. In a
young state the frond is clothed with long, peUucid fibres. Substance
membranaceous, soft; when young, slimy, adhering to paper. Structure
reticulated, the membrane composed of large, lax cells. Colour ohve, more
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