Ser. GOXGYLOSPERMEiE. ( 151 ) Fam. CERAMIACE.E. 



CALLITHAMNION TURNEEI.— ^r/. 



Gen. Char. — Fronds filiform and articuLated, sometimes at length in the older parts 

 cellular and partially opaque, single-tubed ; divisions mostly pinnate, dissepiments 

 hyaline. Fructification of two kinds, on distinct plants : 1. Favellse, mostly 

 lateral on the branches, and filled with minute spores ; 2. Tetraspores, external, 

 tripartite or cruciate. Name from Ka\hs, "beautiful," and dajxvos, "a shrub." 



Callithamnion" Turneri. — Fronds arising from creeping fibres, simple 

 or two to three times pinnated, pinnte rather patent, cyhndrical, very- 

 slender ; articulations of the main stems five to eight or ten times 

 longer than broad ; favellee stalked, furnished with an involucre ; tetra- 

 spores clustered. 



Callithamnion Turneri. — Ag. Syst. AJg. vol. ii. p. 100 ; Wyatt, Alg. Danm. 

 No. 183; /. Ag.AIg. Medit. p. 70 ; Endl. .3rd Suppl. p. 34 ; Kiitz. Phyc. 

 Gen. p. 373 ; Haw. in Hooh. Br. Fl. vol. ii. p. 339 ; Ilarv. in Mach. 

 Fl. Hib. part 3, p. 217; Harv. P. B. plate 179 ; Harv. Man. p. 172 ; 

 Harv. Syn. p. 144 ; Atlas, plate 58, fig. 266; Harv. N. B. A. part 2, 

 p. 241 ; /. G. Agardh, Sp. Gen. Alg. vol. ii. p. 23. 



Callithamnion repens. — Lyngh. Hyd. Dan. p. 128, t. 40; Ag. Sp. Alg. vol. ii. 

 p. 184; Harv. in Hooh. Br. Fl. vol. ii. p. 348; Harv. in Mach. 

 Fl. Hib. part 3, p. 218; Harv. Man. 1st ed. p. 115; Kiltz. Phyc. 

 Gen. p. 372. 



Callithamnion variabile. — Ag. Sp. Alg. vol. ii. p. 163; Kiitz. Phyc. Gen. p. 372. 



Ceramifm Turneri. — Both, Cat. vol. iii. p. 128, t. 5 ; Ag. Syst. p. 142 ; Grev. 

 Crypt, t. 355. 



Ceeamium repens. — Ag. Syn. p. 63 ; Ag. Syst. p. 131. 



Conferva Turneri.— Dillw. t. 100 ; E. Bot. t. 2339 (not t. 1637). 



Conferva repens.— Dillw. t. 18; Roth, Cat. vol. iii. p. 221 ; E. Bot. t. 1608; 

 Fl. Dan. t. 1665. 



Conferva tenella. — Dillw. Syn. p. 72, t. F. 



Var. /3. Branches alternate, distant, and sparingly divided. 



Hab. — Parasitical on other Algaj, between tide-marks. Annual. Summer. Common. 

 Geogr, Dist. — Atlantic shores of Europe and North America ; MediteiTaneau Sea. 



Description. — Root composed of creeping fibres, which attach them- 

 selves to other plants by small discs. Fronds densely tufted, slender, 

 cylindrical, from one to two or three inches long, capillaceous, simple or 

 two to three times pinnated ; pinnae in the normal form opposite, erecto- 

 patent or nearly patent, all veiy slender and cylindrical, scarcely 



