CONFERVA. 209 



often several feet in diameter, of a pale or full green colour. |3. is found 

 near high-water mark, and is usually of a duller colour, singularly bent 

 and distorted, and from the angles throwing 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, Dillvv. ; filaments very slender, capillary, 

 rather flaccid, forming extensive, much entangled, bright 

 green strata; articulations rather longer than broad. Harv. 

 1. c. p. 352 ; Dillw. Suppl. t. B. ; Wyatt, Alg. Damn. No. 

 142. C. intricate, Grev. Edin. p. 315. Bangia Johnstoni, 

 Grev. in Johnst. Berw. Fl. p. 260. Also C. ulothrix, Lyngb. 

 (of Isted. p. 129). 



On marine rocks and attached to Algae. Bantry, Miss Hutchins. Ber- 

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

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

 shorter joints, forming densely interwoven strata, or little tufts among the 

 branches of other Alga3. Bangia Johnstoni, as Dr. W. Arnott first pointed 

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



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



8. C. melagonium, 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. 1. 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. area, Dillw. ; filaments elongated, tufted, straight, 

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

 Harv. Phyc. Brit. t. xcix. B.; Harv. 1. c. p. 354; JVyatf, 

 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. area, &. lubrica, Dillw. Syn. p. 48. 



p 



