CONFERVA. 209 



often several feet in diameter, of a pale or full p;reeu colour. ^. is found 

 near high-water mark, and is usually of a duller colour, sins^ularly bent 

 and distorted, and from the angles thvowinjj- out tubular, indistinctly joint- 

 ed, partially colourless radicles, " which adhere to particles of sand and 

 other matters within their reach, often to a neighbouring filament." Carm. 



7. C. implexa, Dillw. ; filaments very slender, capillary, 

 rather flaccid, forming extensive, mnch entangled, bright 

 green strata; articulations rather longer than broad. Harv. 

 I. c. p. 352 ; Dilliv. Siippl. t. B. ; Wyatt, Alg. Danm. No. 

 142. C. iniricata, Grev. Eclin. p. 315. Bangia Jolinsloiii, 

 Grev. in Johust. Berw. Fl. p. 260. Also C. iilothrix, Lynyh. 

 (of 1st ed. p. 129). 



On marine rocks and attached to Algse. Bantry, Miss Hutckins. Ber- 

 wick, Dr. Johnston. Frith of Forth, Dr. Greville. Miltown Malbay. Tor- 

 quay, Mrs Griffiths. — Filaments half as thick as those of C. torluosa, with 

 shorter joints, forming densely interwoven strat;i, or little tufts among the 

 branches of other Algas. Bangia Johnstoni, as Dr. W. Aruott first pointed 

 out to me, differs in no respect from this species. 



** Filaments tufted, straight, attached, erect or decumbent {not stratified). 



8. C. melagonivrn, Web. and Mohr; filaments elongate, 

 scattered, straight, thick, erect, stiff and wiry, dark green ; 

 articulations twice as long as broad. Harv. Phyc. Brit. t. 

 xcix. A.; Harv. I. c. p. 354; Dillw. Conf. Sup. t. B.; 

 Wyatt, Alg. Danm. No. 221. 



In the sea, growing on rocks at the extreme verge of low-water mark; 

 found on many parts of the coast, but not common anywhere. — Filaments 

 5 — 8 inches high, thicker than bristles, scarcely tufted, generally but three 

 or four together or solitary, remarkably rigid and wiry, tenacious and 

 difficult to break; dissepiments somewhat contracted, very narrow, but 

 pellucid. 



9. C. cerea, Dillw. ; filaments elongated, tufted, straight, 

 harsh, brittle, yellow-green ; articulations as long as broad. 

 Harv. Phyc. Brit. t. xcix. B. ; Harv. I. c. p. 354 ; Wyatt, 

 Alg. Danm. No. 191 ; E. Bot. t. 1929. 



In the sea, on sand-covered rocks, frequent. — Filaments 3 — 12 inches 

 long, tufted, as thick as hogs' bristles, harsh to the touch, of a beautiful 

 yellow-green colour, fading in the herbarium to a dirty white. Colouring 

 matter of the joint finally parted in the centre. The articulations are 

 visible to the naked eye. 



10. C. collabens, Ag. ; filaments elongated, straight, tufted, 

 very thick, gelatinous and flaccid, of a splendid aeruginose 

 green ; articulations once and a half as long as broad. Harv. 

 I. c. p. 354. C. <Brea, (3. liihrica, Dillw. Syn. p. 48. 



p 



