P la t e C.
GRATELOUPIA FILICINA, Äg-
G e n . C h a k . Trond flat, more or less pinnate, membranaceous, flexible,
soM, composed of densely interwoven, anastomosing, b ranching filaments
; those of the periphery monihform, short and very strongly
compacted together. Fructification-, 1, globular masses of spores
{favellidia) immersed beneath th e peripheric stratum, and communicating
with th e surface by a p o re ; 2 , cruciate tetraspores vertically
placed among th e filaments of th e periphery, in sub-defined sori.—
G e a ie lo u p ia {Äg), in honour of B r. Grateloup, a F rench Algologist.
Gr a t e l o u p i a frond hnear, narrow, tapering to either extremity,
irregularly once or twice pin n a ted ; pinnæ flexuous, patent, contracted
a t th e base and attenuated towards th e apex.
G e a ie l o u p ia filicina, J g . Sp. Alg. vol. i. p. 224. Sgst. p. 241. Spreng. Syst.
7%. vol. iv. p. 334. Grev. Alg. Brit. -ÿ.151. t . \ 3 . Hook. B r .M . Yo\.n.
p. 306. Wyatt, Alg. Banm. -0.0.12 3 . Harv. Man. -ÿ. 33. J .A g . Medit.
p. 103. Bndl. 3rd Suppl. p. 41. Kütz. Fhyc. Gen. p. 397. Mant. M. Alger.
G e a ie l o u p ia p o rra c e a , Kütz. Bhyc. Gen. p . 3 9 7 .
D e l e s s e e ia filicina, Lamour. Ess. p . 3 8 .
G e l id iu m n eg le c tum , Bory, El. Pelop. p .
F u ous fUicinus, Wulf.inJacg. Coll. vol.üi. p. 157. t. 15. f. 2. Turn. Hist.
Eue. 1 .150. Esper, Ic. Eue. vol. i. p. 134. t. 67.
H a b . On submarine rocks a t half-tide level, frequently where small streamlets
ru n into th e sea. Very rare. Perennial. Winter. Sidmouth
and Hfraoombe, Miss Cutler. Barrowcane and Hagington, M.rs.
Griffiths. Mount’s Bay, Cornwall, plentiful, and a t Aberystwith,
Mr. Balfs.
G e o g r . D is t b . Atlantic shores of France and Spain. Abundant in the Mediterranean.
Cape of Good Hope. Indian Ocean.
D e s c r Eronds rising from a scutate base, tufted, seldom (in British specimens)
more than two inches high, but, in warmer countries, reaching 8 - 1 0 inches
in lenrth from half a Une to a line in breadth, flexuous, flat, undivided or
once o“r twice irregularly forked, sometimes neai-ly bai-e or with a few lateral
branches, but more frequently closely pinnated with more or less regularity.
Pinnce opposite or alternate, patent, distichous, flexuous, tapermg to a fine
point narrowed at the base, simple, often pinnulated toward the apex,
the pinnulæ sometimes irregularly forked. Tubercles {favellidia) crowded
toward the base of the pinnæ, in whose substance they are deeply imbedded,
communicating with the surface by means of a pore, contammg a mass of •
densely compacted spores. Tetraspores thickly scattered among the surface
cells of accessory leaflets or pinnules, vertical, cruciately divided. Substance
cartüagineo-membranaceous, soft, but very tough. Colour a dull brownish
red. __________
2 b 2
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