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f
Ser. EuoDosrEiiMBÆ. Fam.
P l a t e CCCXIV.
CALLITHAMNION DAVILSII, Lyngb.
Gen. C h a e . Frond rosy or brownish-red, filamentous; stem either opake
and cellular, or translucent and jo in ted ; branches jointed, one-tubed,
mostly pinnate (rarely dichotomous or irreg u la r); dissepiments hyaline.
F m it of two kinds, on distinct plants ; 1, external tetraspores,
scattered along the ultimate branchlets, or borne on little pedicels;
2, roundish or lobed, beiry-hke receptacles (favella) seated on the
main branches, and containing numerous angular spores. C a ll i -
TiiAMNlON {Lyngh.),— from koXXos, beauty, and bagmov, a little shrub.
C a llith am n io n L a v ie s ii; rose-red, minute, tufted, much branched;
branches curved, scattered, p a te n t; ramuli of several cells, fascicled,
or crowded toward the axils of th e secondary branches ; tetraspores
■ pedicellate, borne on the axillary ramuli.
Callithamnion Daviesii, Lyngb. E y i. Ban. p. 139. t. 41. Ag. Sp. Alg. vol,
ii. p. 186. Harv. in Hook. Brit. M. vol. ii. p. 348. Harv. Man. ed. 1.
p. 117. ed. 3. p. 184. {inpart). Kiitz. Spec. Alg. p. 638. {inpart).
ÏKENTEPOHLIA Daviesii, Harv. in Mack. M. Hib. part 3. p. 219.
CoNEBKVA Daviesii, Billw. Conf. t. F. E. Bot. t. 2329.
H a b . Parasitical on Ceramium rubrum and other small Algse, in pools
between tide-marks. Annual. Summer and Autumn. Anglesea,
Rev. H. Lavies. Bantry, Miss Ilutcliins. Torquay, Mrs. Griffiths.
Brighton, Mr. B o rre r; and perhaps generally distributed round our
shores.
Geogr. D is t k . Atlantic Shores of Europe. North America.
Desck. Eilaments two to four lines high, forming small, pencil-like tufts, or
spreading continuously, sometimes but slightly divided, sometimes much
branched, the branches in one or two series, curved, spreading. Primary
branches elongated, destitute of ramuli, but bearing usuaUy, at considerable
intervals, two or more rather short, secondary branches, which are either
alternate or secund, and are furnished near their base, almost at the axil,
with several secund closely-placed ramuli. Ramuli of several cells, either
simple or slightly branched, rarely scattered. Tetraspores pedicellate,
borne on the supra-axillaiy ramuli, elliptical. Colour a fine rosy red. Substance
membranaceous and delicate. In drying, the plant adheres closely
to paper.
Under the last plate I have stated the close affinity which connects
this species, with the Cal. virgatulum, there figured. Both
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