Ta/< C L I / y .
¿i S’S
Ser. EhodosPermeyE. Tam. Ceramiea.
P l a t e CLXIV.
CALLITHAMNION CRLCIATLM, Ag.
Gen. C h a r . Frond tony, or brownish-red, filamentous ; stem either opake
and cellular, or translucent and jointed; branches jointed, one-tubed,
mostly pinnate, ( ra re ly dichotomous or irregular) ; dissepiments hyaline.
F rtiit of two kinds on distinct plants ; 1, external tetraspores, scattered
along the ultimate branchlets, or borne on little pedicels ; 2,
roundish or lobed, berry-like receptacles { fa v e lla ) seated on the main
branches, and containing numerous, angular spores. C a l l i t h a m n i o n
{Lyngb.),—-from saXos, heantiful, and ôagviov, a lÀttle shrub.
C a l l i t h a m n i o n cruciatum ; filaments densely tufted, irregularly and rather
sparingly branched ; branches alternately divided, jointed, furmslied
at each joint with two to four opposite or quaternate, slender, short
pcctinato-pinnate ramuli; tetraspores elliptical, subsessile, borne on
the lowermost joints of the ramuli.
C a l l i th am n io n oruciatum, Ag. Syst. Alg. vol. ii. p. 160. H a n . m Hofc.
Br M vol ii. p. 339. Wyatt, Alg. Banm. no. 182. H a n . Man. p. 104. .
J. Ag. Alg. Medit. p. 7 0 . Fndl. 3rd Suppl. p. 34. Hook. fil. et H a n . m
Bond. Journ. vol. vi. p. 412.
^ p um ihm -, much smaller, the ramuli more dense, and the joints shorter.
C a l l i t h a m n i o n cruciatum, 3 p u m i l u m , Harv. Man. p . 1 0 4 .
Callithamnion pumilum, Harv. in Hook. Br. M. vol. ii. p. 339. Fndl. 3rd
Suppl. p. 34. Harv. in Mack. M. Hih. p a rt 3. p. 313.
Hab . On mud-oovered rocks, near low water mark. Annual. Summer.
Rather rare. Pier, Torquay, Mrs. Griffiths. Salcombe, Mrs. Wyatt
Milford Haven, M r. B a lfs. Plymouth, Rev. W. S. Hore Cork
Harboui-, Dr. J . R . Harvey. Coast of Down, M r W ihrnnfmn
Perriter’s Cove, Kerry, M r. W. Andrews. Miltown Malbay, W .li.lL
G e o g k . D i s t r . Atlantic shores of Prance and Spain. Mediterranean and
Adriatic Seas. Tasmania, Mr. Gunn.
D e s c r . Mlaments one to two inches long, capillary, flaccid, densely tufted,
sparino-ly branched in an ircegular manner. Branches mostly alternately
divided the lesser divisions furnished with short lateral branchlets, jointed;
each joint throughout the whole length of the plant furnished with slender
opposite or quaternate and cruciate ramuli. Bomuli not more than halt the
diameter of the branches, from half a line to nearly a line long erecto-patent,
straight, pectinato-pinnate ; the pinnulæ opposite, very slender, cylindrical,
not greatly tapering to the point. Apices of the branches darkened, owing
to the crowding of the terminal ramuli. Articulations of ihe f a m saA
branches from two to four times as long as broad ; of the rainuli tiyice or
thrice ■ and of the pinnulæ about twice as long as broad ; the dissepiments
somewhat contracted. Tetraspores formed by the metamorphosis oi the
lowermost pinnulæ, sessile or subpedieellatc. elliptical, ci-uciately divided,
with a rather narrow limbus. Favellæ 1 have not seen. Colour a browmsh-
rcd. Substance llaccid. The plant adheres closely to paper, and is apt to
decompose if wetted after once it has been dried.
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