I'liNe- r x .\\/\
P l a t e CXXXIX.
CERAMIUM CILIATUM, Dacluz.
G e n . C h a b . Frond filiform, one-tubed, articulated; the dissepiments coated
with a stratum of coloured cellules, which sometimes extend over the
surface of the articvdation. Fructification of two kinds, on distinct individuals
; 1, tetraspores, either immersed in the ramuli, or more or less
external; 2, sessile, roundish receptacles { fa v e lld ) , having a pcHncid
limbus, containing minute, angular spores, and subtended by one or
more short, involucral ramuli. C e e am ium (Aotó.),—from Kepagos, a
p itcher, but the fruit is not pitcher-shaped.
C e e am ium ciliatwm ; frond slender, of nearly equal diameter tliroughout,
rigid, repeatedly dichotomous, with or without lateral branchlets,
fastigiate, the apices strongly involute ; articulations pellucid, those of
the middle of the stem from three to four times longer than broad, the
upper gradually shorter ; dissepiments coloured, furnished with a whorl
of robust, subulate, three-jointed qiriekles; tetraspores alternating
wdtli the prickles ; favellæ subtended by two or three ramuli.
Ce eamium cilintum, Bueluz. Fss. p. 64. Lyngh. Hyd. Ban. p. 131. t. 37. Ag.
Sp. Alg. vol. ii. p. 153. Hook. FI. Scot. part 3. p. 14. Grev. M. Edin.
p. 311. Harv. in Hook. Br. El. vol. ii. p. 336. Harv. in Mack. El. Hib.
part 3. p. 311. Harv. Man. g. IMt. Wyatt, Alg. Banm. vlO.\39. J. Ag.
Alg. Medit. p. 81. J . Ag. Advers. p. 36. Mont. El. Algier. p. 145.
C e eam ium diaphanum, var. ciliatum, Baby, Bot. Gall. p. 967. Ag. Syst.
p . 134.
E ohinoceeas ciliatum, Kiitz. inlAnn. vol. xv. p. 736. Kiitz. Fhyc. Gen. p. 380.
B oetna ciliata, Gratel. Bory, Bict. Glass. El. Pelop. p. 77.
Ooneeeva cüiata, Ellis, Phil. Trans, vol. Ivii. p. 435. t. 18. fig. h. H. Huds.
El. Ang. p. 599. Ughtf. El. Scot. p. 998. With. Br. El. vol. iv. p. 137.
Billw. Gonf. p. 77. t. 53. E. Bot. t. 2428.
Co n fe eta pilosa, Both. Cat. Bot. vol. ii. p. 335. t. 5. f. 2.
H a b . On rocks and stones in the sea, either in tide pools or exposed at
low water; also attached to Corallines and other Algæ. Annual.
Summer. Not uncommon on the British shores, from Orkney to
Cornwall.
Geo g e . D is t e . Dispersed throughout the Atlantic and Pacific Oceans, in temperate
latitudes of the northern and southern hemisphere.
D e so e. Fronds forming dense tufts, from three to six inches in diameter, as fine
as human hair, nearly of equal diameter throughout, rigid, harsh and rather
hrittle, repeatedly dichotomous, occasionally furnished with lateral dichoto-
mous branchlets, fastigiate ; the cpices strongly hooked inwards ; axils
rather patent. Articulations colourless, those of the lower parts of the
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