204 CLADOPHORA. 



broad. E. Bot. t. 2327 ; Harv. I. c. p. 358 ; IVt/att, Ahj. 

 Damn. No. 96 ; Harv. Phyc. Brit. t. ccxxxv. 



On rocks and the larger Algae in the sea, below half-tide level ; frequent. 

 — Tufts 2 — 6 inches long, pale green, exceedingly dense or spongy, flaccid. 

 Filaments extremely slender, excessively and intricately branched ; the 

 branches very irregular: ultimate ramuli short, patent, opposite or secuud, 

 issuing from almost every joint, and occasionally bearing a second set. In 

 the herbarium it fades to a pale yellowish, wholly without gloss, by which 

 character it is best marked from its allies. Joints short. Mrs. Griffiths 

 finds a beautiful plant at Torquay, having many characters in common with 

 C. alhida, hut 12 inches long and of a bright yellow-green colour, which is 

 partially preserved in drying. For the present I regard it as a variety 

 of this species. 



16. C. lanosa, Roth ; filaments slender, short, yellow- 

 green, forming dense tufts ; branches virgate, erect, sub-dis- 

 tant, straight, alternate or opposite, with a few alternate or 

 secund ramuli, axils very acute ; lower articulations twice, 

 upper six times longer than broad. E. Bot. t. 2099 ; Harv. 

 I. c. p. 358; Wyatt, Alg. Damn. No. 194; Harv. Phyc. 

 Brit. t. vi. 



In the sea, on rocks or, more frequently, on the larger Fuci. — Filaments 

 forming small, entangled, woolly tufts, an inch long, pale green, stoloni- 

 ferous below, branches straight and erect, all the axils very acute. In a 

 dry state it is wholly without gloss, faded, except near the tips, where it 

 generally preserves a glaucous green colour. 



17. C. uncialis, Fl. Dan ; tufts very short, spongy, sim- 

 ple below, above divided into numerous fasligiate, woolly 

 segments ; filaments flexuous, sparingly branched, densely 

 interwoven ; ramuli distant, secund, somewhat pectinate, 

 long, patent or incurved ; articulations 2 — 4 times longer than 

 broad. Ac/. Syst. Alt/, p. Ill ; Fl. Dan. t. 771, /". 1 ; Harv. 

 in Hook. Joiirn. Bot. p. 304; Wyatt, Alg. Damn. No. 146; 

 Harv. Phyc. Brit. t. ccvii. 



On rocks near low-water mark. Torquay, 3Irs. Griffitlis. New Castle, 

 coast of Down, Mr. W. Thompson. Eathlin, Antrim, Mr. D. Moore. 

 Common at Balbriggan. — Tufts an inch high, dark green, spongy, with 

 something the habit of Ectocarpus tomentosus, composed of slender, irre- 

 gularly branched filaments, densely entangled. Certainly nearly allied to 

 the preceding, with some states of which it may, without careful examina- 

 tion, be confounded. 



18. C. arcta, Dillw. ; filaments forming broad, somewhat 

 starry tufts, of a full green colour, much branched ; branches 

 straight, crowded, erect; ramuli sub-appressed, opposite or 

 alternate ; articulations either uniformly twice as long as 

 broad, or with the lower joints short, the upper very long. 



