Siiit. GONGYLOSrEKME.E. ( 135 ) Fam. CEKAMIACEyE. 



Plate CXIII. 

 GEIFFITHSIA COEALLINA.— .1^/. 



Gen. Char. — " Frond rose-red, filamentous; filaments jointed tliroughout, mostly dicbo- 

 tomous; ramuli siugle-tubed; dissepiments hyaline." Fructification of two kinds, 

 on distinct plants : 1. Favellfe, surrounded by an involucre ; 2. Tetraspores, 

 attached to whorled "iuvolucral ramuli." Name in honour of Mrs. Griffiths, well 

 known for her numerous and valuable discoveries among British Algae. 



Griffithsia corallina. — Frouds gelatinous, cylindrical, filiform ; 

 branches dichotomous, patent ; lower articulations clavate, upper ellip- 

 tical ; involucres of the tetraspores whorled, those of the favelhe lateral, 

 short, sjDiue-like, incm-ved. 



Gkiffithsia coraUina. — Aff. Syn. p. 28 ; Hool:. Fl. Scot, part 2, p. 84 ; Ay. Syst. 

 p. 145; Ag.Sp. Alg. vol. ii. p. 127; Wyatt, Alg. Damn. No. 89; Kiitz. 

 Phyc. Gen. p. 374 ; Endl. 3rd Suppl. p. 35 ; Haw. in Hooh. Br. Fl. 

 vol. ii. p. 338 ; Harv. in Mack. Fl. Hib. part 3, p. 212 ; Harv. P. B. 

 plate 214; Harv. Man. p. 168; Harv. Syn. p. 140; Atlas, plate 55, 

 fig. 252 ; Harv. N. B. A. part 2, p. 228 ; /. G. Agardh, Sp. Gen. Alg. 

 vol. ii. p. 78. 



Callithamnion corallinum. — Lyngb. Hyd. Dan. p. 126. 



Conferva corallina.— Linn. Sp. PI. p. 1636; Lightf. Fl. Scot. p. 988; With. 

 vol. iv. p. 136 ; Mohr, Isl. p. 250 ; Both, Cat. Bot. vol, iii. p. 225 ; 

 Dillw. Conf. t. 98 ; K Bot. t. 1825. 



Conferva corailinoides,- — Limi. Sp. PI. 1st edit. p. 1166 ; Huds. Fl. Angl. p. 598. 



Conferva geniculata. — Ellis, in Phil. Trans, vol. Ivii. p. 425, t. 18, fig. F, f. 



Conferva marina gelatinosa, corallince instar geniculata crassior. — Dillw. Muse. 

 vol. xxxiii. t. 6, f. 36. 



Hab. — On rocks, stones, and shells in pools near low-water mark. Annual. Summer 

 and early autumn. Not uncommon all round our coasts. 



Geogr. Dist. — Atlantic and Mediterranean shores of Europe ; Faroe Islands ; Iceland ; 

 North America ; Tasmania. 



Description. — Root, a minute " disc." Fronds tufted, one to five 

 inches or more in length, one-fourth of a line in breadth, much branched 

 dichotomously ; branches cylindrical, erecto-patent, short and subfas- 

 tigiate ; lower articulations clavate, with rounded apices, four to five 

 times longer than broad ; upper short, elliptical, apical, roundish, all filled 

 with dark red endochrome. Favelhe two or three together, sessile on 

 the lateral apices of the joints of the principal branches, involucre con- 



