P l a t e CCXC.
CODIUM BURSA, Ag.
Gen. CtiAE. Frond green, sponge-like (globular, cylmdrical, or fla t; simple
or branched), composed of tubular, interwoven, inarticulate iilaments
(elongated, branching cells). Fructification, opake vesicles {conio-
cystd) attached to th e filaments. C o d iu m {S ta c k ),— irom
the skin o f an animal.
C o d iu m B u rsa ; frond spherical, hollow.
C o d i u m Bursa, Ag. Sp. Alg. vol. i. p. 4 5 7 . Ag. S y s t . j . 1 7 8 Grev. Alg.
Brit. p. 1 8 6 . Hook. Br. II. vol. ii. p. 3 1 8 . Harv. m Mack. M. m part 3 .
p . 2 s i 7/«™. I f « , ed. 2 . p. 1 9 3 . Midi. 3rd Suppl. FAz.Phyc.
Gen. p. 3 0 9 . Kütz. Sp. Alg. p. 5 0 2 .
S p o n g o d i u m Bursa, Lamour. Ess. p . 7 3 .
L a m a r o k i a Barsa, Olivi, Zool. Adriat. p. 2 5 8 .
A g a r d h ia Bursa, Cabrera, fide Ag.
Fucus Bursa, Turn. Hist. 1 .136. E. Bot. t. 2183.
A l c y o n iu m Bursa, Linn. Syst. Nat. p. 1295.
B u r s a marina, C. Bauhin, Pin. p. 3 6 8 . Bay, Syn. p. 8 1 . no. 3.
Hab . On submarine rooks. Perennial. Summer. Very rare.— “ Coast
of Sussex, plentifully,” Pallas (quoted by Turner) Shores of Cornwall,
Mr. Rashleigh. Near Torquay, Mrs. Griffiths. Near Belfast,
Mr. Templeton.
G e o g r . D i s t r . Atlantic shores of France and Spain. Mediterranean and
Adriatic Seas.
D e s o r . Eronds attached to the rock by interwoven and matted fibres, several
fronds growing together, spherical, hollow, varying in diameter from one to
six or eight inches, soft and sponge-like, enthely composed of slender hbras
closely interwoven together; those which form the groundwoik of the
frond matted round the inner surface of the hollow ball, and tlirowing out
to the circmnference minute club-shaped, vertical ramuli, which are closely
packed together, and extend with their points erect, and sides parallel, like
the threads in a pile of velvet. Substance soft. G)7omî', when growing, a
dark, fuU green, becoming much paler when dry. ErucUficahon not observed.
but probably simUar to that of 0. y—
Not being so fortunate as to possess a British specimen of
this very rare and curious plant, I have been forced to make
the drawing for the plate from some of a hue series which I owe
o 2
T.Hee-ve.im-j.