Ser. RHODOSPERMEA. Fam. Ceramiea. 
Puate CCXII. 
CALLITHAMNION PEDICELLATUM, ~“%. 
Grn. Cuan. Frond rosy or brownish-red, filamentous, stem either opake 
and cellular, or translucent and jointed; branches jointed, one-tubed, 
mostly pinnate (rarely dichotomous or irregular) ; dissepiments hya- 
line. Fruit 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 (favel/e), seated on the 
main branches, and containing numerous, angular spores. CaLLt- 
THAMNION (Lyngb.),—from xados, beautiful, and @apnov, a Little shrub. 
CALLITHAMNION pedicellatum; stems setaceous, pellucid, jomted, loosely 
and irregularly divided; branches furnished with short, alternate, 
sparingly dichotomous ramuli; apices very obtuse; articulations 
variable, mostly very long; tetraspores(?) solitary, elliptical or pear- 
shaped, axillary, stalked. 
CALLITHAMNION pedicellatum, 4g. Sp. Alg. vol. ii. p.174. Harv. in Hook. 
Fl. Brit. vol. ii. p. 347. Harv. in Mack. Fl. Hib. part 3. p.217. Harv. 
Man. p.114. Wyatt, Alg. Damn. no. 94. J. Ag. Alg. Medit. p. 13. Kiitz. 
Phyc. Gen. p.371. Endl. 3rd. Supp. p. 34. 
CaLLITHAMNION clavatum, 4g. Sp. Alg. vol. ii. p.180. J. Ag. Alg. Medit. 
p- 73. Kitz. Phyc. Gen. p.371. Mont. An. Se. Nat. 1839. p. 166. End. 
3rd, Supp. p. 34. 
CALLITHAMNION Perreymondii, Dudy. Mem. vol. ii. t. 4. f. 5. 
CaLLITHAMNION botryticum, De Not. (fide Lenorm.) 
GRIFFITHSI4 itregularis, Kiitz. Actien, 1836. 
Czramivm pedicellatum, 4g. Syst. p. 137. 
CERAMIvUM clavegerum, Bonn. Hyd. loc. in An. Mus. Par. 1825. p. 90. 
ConFerva pedicellata, #. Bot. t.1817.  Dillw. Conf. t. 108. 
Has. On rocks and wood-work, near low-water mark, mostly in deep 
rock-pools; sometimes dredged in from 4-7 fathoms. Rather rare, 
but found all round the coast. Annual. Summer. Brighton, 
Mr. Borrer. Torbay &c., Mrs. Griffiths. Sidmouth, Miss Cutler. 
Falmouth Bay, Miss Warren. Salcombe, Carnarvon, and Milford 
Harbour, Mr. Ralfs. Jersey, Miss White and Miss Turner. Bantry 
Bay, Miss Hutchins. Malbay, Valentia, and Wicklow, W.H.H. 
Portaferry and Bangor, Belfast Bay, Mr. W. Thompson. Roundstone, 
My. M‘ Calla. Ferriter’s Cove, Mr. W. Andrews. Howth, Miss 
Gower. Orkney, Rev. J. Pollexfen. Dredged in Calf Sound, in seven 
fathoms, Messrs. Thomas and M*‘ Bain.  Saltcoats and Ardrossan 
(on the pier), Rev. D. Landsborough. 
Groer. Distr. Atlantic shores of France. Mediterranean Sea. 
Descr. Root discoid, or somewhat fibrous. Fronds densely tufted, from two to 
six or eight inches high, as thick as hogs’ bristles, irregularly divided in a 
manner between alternate and dichotomous; branches sometimes nearly 
simple, long and virgate, sometimes repeatedly branched, and somewhat 
flabellate, more or less fastigiate, seldom quite naked, generally furnished 
at each joint with short, forked, or twice or thrice dichotomous, alternate 
ramuli. Ultimate divisions of the forked ramuli often incurved, cylindrical, 
Zz 2 
