230 ALG,E CHLOROSPERMEiE. [Conferva. 



lations 4 — 5 times longer than broad. Dillw. Suppl. t. E. — 

 E. Bot. t. 2327. Harv. in Hook. Br. Fl. v.n. p 358. 



On the larger Algae. Bantry ; Miss Hutchins. Filaments ex- 

 ceedingly slender, pale green, which soon fades to a dirty white. 



35. C. lanosa, Roth. Woolly cottony Conferva. Filaments 

 slender, short, yellow-green, forming dense tufts; branches 

 virgate, erect, subdistant, straight, alternate or opposite, with a 

 few alternate or secund ramuli, axils very acute ; lower articu- 

 lations twice, upper six times as long as broad. Dillw. Suppl. 

 t. E.—E. Bot. t. 2099. Harv. in Hook. Br. Fl. v. ii. p. 358. 



On rocks and the larger Algae. Tufts an inch long, pale yellow- 

 green. 



36. C. arcta, Dillw. Close green Conferva. Filaments 

 elongated, forming silky tufts of a full ceruginose-green colour, 

 much branched ; branches erecto-patent, crowded ; ramuli 

 erect, appressed, opposite or alternate; lower articulations as 

 long as, upper much longer than broad. Dillw. Suppl. t. E. 

 E. Bot. t. 2098. Harv. in Hook. Br. FL v. ii. p. 359. 



On various Algae. Bantry ; Miss Hutchins. Kilkee, County of 

 Clare. Filaments 3 — 6 inches long, brilliant green, flaccid. Branches 

 straight. The joints are very variable in length ; in some specimens 

 which I have seen they are uniformly short, whence I presume that this, 

 or C. centralis, may be the doubtful C. aeruginosa of Hudson. 



37. C. gracilis, Griff. MSS. Graceful Conferva. Filaments 

 slender, fiexuose, silky, much branched, bright yellow-green ; 

 main branches entangled, sparingly divided, angulato-flexuose ; 

 ultimate ramuli pectinato-secund, much attenuated, straight 

 and very long ; articulations about 3 — 5 times longer than 

 broad. Wyatt. Alg. Danm. No. 97. 



Youghal ; Miss Ball. At Wicklow ; W. H. Harvey. Filaments 

 6 — 12 inches high, forming beautiful tufts of a rich yellow-green colour, 

 glossy when dry ; main filaments remarkably angularly curved, covered 

 with long, slender, delicate, pectinate ramuli, which taper to a fine point. 

 This beautiful plant (which was lately discovered at Torquay by Mrs. 

 Griffiths and Mrs. Wyatt) approaches, in some of its characters, the C. 

 flexuosa of Dillw., a native of salt marshes, and by Agardh made a va- 

 riety of C. fracta. The appearance, however, of C. gracilis is very 

 different, and, I would hope, it is sufficiently characterized. Whether 

 or not it be the C. sericea of Continental authors, I have no means 

 of judging, and dare not decide without reference to authentic 

 specimens. My Irish specimens, while they agree with those from 

 Torquay in all essential particulars, fall short of them in size and 

 beauty. 



38. C. riparia, Roth. Entangled shore Conferva. Fila- 

 ments elongated, slender, decumbent, pale-green, forming wide 

 strata, flaccid, entangled, angulato-flexuose, slightly branched ; 

 lower branches short, tentacular; upper long, subsimple, with 

 roundish axils ; articulations 2 — 4 times longer than broad. 

 E. Bot. t. 2100. Harv. in Hook. Br. Fl. v. ii. p. 359. 



