CLADOPHORA. 203 



Filaments forming soft, silky tufts, 6 12 inches long, with something of 

 a main stem, from which spring very numerous, long, and more or less di- 

 vided, very flexuous or angularly twisted branches, plentifully clothed with 

 elongated, pectinate, secund branchlets, of which the ultimate ramuli are 

 very long, slender, and straight or slightly curved. Colour a fine, rich, yel- 

 low-green, somewhat faded in the herbarium, but preserving a silky gloss. 

 Substance soft, imperfectly adhering to paper. Nearly allied in character 

 to C.Jlexuosa, but with a very different habit. 



13. C. Rudolphiana, Ag. ; filaments very long, exceed- 

 ingly slender, flexuous, subgelatinoso-tnembranaceous, much 

 branched, yellow-green, inextricable ; branches di-ti'ichoto- 

 mous or irregular ; ultimate ramuli pectinate, secund, very 

 long and much attenuated ; articulations of the main fila- 

 ments many times longer than broad, here and there swollen, 

 their granular endochrome somewhat spiral ; those of the ra- 

 muli 6 10 times as long as broad. Harv. Phyc. Brit. t. 

 Ixxxvi. C. Katieana, M'Calla, Alg. Hib. No. 29. 



Parasitical on Zostera, and various Laminaria, and other Algae, in 2 6 

 fathom water. Annual. Summer. Very abundant in Roundstone Bay, 

 Connernara, Mr. W. M'Calla. Falmouth, Miss Warren. Filaments 

 6 20 inches long, exceedingly slender and soft, forming beautifully silky, 

 bright green, sub-gelatinous tufts. A much more slender plant than C. gra- 

 cilis, with longer joints and more attenuated ramuli. 



14. C. refracta, Ag. ; filaments capillary, sub-rigid, tufted, 

 bright green, very much branched; secondary branches 

 spreading on all sides, repeatedly divided, thickly clothed 

 with very patent or reflexed, short branchlets, which are pec- 

 tinated with ramuli on their upper surface. Wyatt, Alg. 

 Damn. No. 228 ; Harv. Phyc. Brit. t. xxiv. 



In the sea ; in rocky pools left by the tide. Dunlecky Castle, Kilkee. 

 Ilfracombe, Mrs. Griffiths. Mangan's Bay, Co. Cork, Miss Ball. Giant's 

 Causeway, Mr. W. Thompson. Filaments 3 or 4 inches long, slender, 

 tufted ; the main stems somewhat woven together or ropy, the secondary 

 branches free, spreading on all sides aud much divided ; the ultimate branch- 

 lets very patent or reflexed, pectinato-secund, opposite or alternate. Colour 

 a brilliant yellowish green, which is partially preserved in a dry state. Sub. 

 stance rather rigid, imperfectly adhering to paper. This beautiful plant is 

 nearly allied to C. albida, but the filaments are coarser and far more rigid, 

 the ultimate branches shorter and more patent, often strongly reflexed, and 

 the habit by no means spongy. 



15. C. albida, Huds. ; filaments exceedingly slender, flac- 

 cid, pale yellow green (whitish when dry), forming dense, 

 silky, or somewhat spongy, intricate tufts ; branches crowded, 

 irregular, the uppermost patent and mostly opposite; ramuli 

 opposite or secund ; articulations 4 or 5 times longer than 



