202 CLADOPHORA. 



densely clothed with appressed ramuli ; articulations 3 or 4 

 times longer than broad. Dlllw. t. 23: E. Bot. t. 1G99; 

 Harv. I. c. p, 357 ; Wyatt, AUj. Danm. No. 95 ; Harv. Phyc. 

 Brit. t. clxxx. 



On rocks in ihe sea, about half-tide level, very common. — Tufts 3—6 

 inches long, very dark or blackish green. Filaments rigid, densely and 

 closely branched, thickly clothed with very erect or appressed ramuli, 

 scarcely adhering to paper. 



10. Clcetevirens,D\\\w. ; filaments much branched, bushy, 

 forming fine tufts of a transparent yellow-green colour, gray- 

 ish and without gloss when dry; branches erecto-patent, 

 crowded, repeatedly divided ; ultimate ramuli secund ; joints 

 of the chief divisions long, of the ramnli about thrice as 

 long as broad. Dillw. t. 48 ; E. Bot. t. 1854. C. glomerata, 

 (3. marina, Ag. — Harv. in Hook. Br. FL ii. p. 357 ; JVt/att, 

 Alg. Danm. No. 143; Harv. Phyc. Brit. t. clxxxix. 



On rocks, stones and Algae, in tide-pools, very common. — Tufts 4 — 8 

 inches long. Except in its marine habitat, I cannot distinguish this from 

 C. glomerata, with which Agardh unites it, as it appears to me, justly. 

 Mrs. Griffiths, however, than whom no one has studied this genus more 

 carefully, is of a different opinion, and to her judgment I yield. 



11. C. Jlexi(osa,'Di\\w.; filaments very flexuous or angu- 

 larly bent, jointed, often sub-opake, rather rigid, dull green, 

 but slightly branched; branches variable in number and 

 length, more or less divided, furnished with long, patent 

 branchlets, whose inner edge is pectinated with a few secund 

 ramuli; articidations thrice as long as broad. Dilliv. t. 10 ; 

 E. Bot. t. 1944. Conf. fracfa, $. Jlcvuosa, Ag. — Harv. in 

 Hook. I. c. p. 356 ; Wyatt, Alg. Danm. No. 227. 



In salt-water ditches near Yarmouth, D. Turner, Esq. In the sea, not 

 uncommon. Torquay, Mrs. Griffiths. Ballycaslle, Miss Hincks. Seve- 

 ral other parts of the east coast of lieXmiA. — Filaments 4—8 inches long, 

 remarkably flexuous, rather harsh to the feel. This really seems distinct 

 from C. fracta, habitat out of the question ; but I suspect that more than 

 one species is confounded under this name. 



12. C. gracilis, Griff. ; filaments capillary, flexuous, silky, 

 much branched, bright yellow-green ; main branches entan- 

 gled, sparingly divided, angulato-flexuous ; ultimate ramuli 

 pectinato-secund, much attenuated, straight and very long ; 

 articulations about 3 — 5 times longer than broad. Griff, in 

 Wyatt, Alg. Damn. No. 97 ; Harv. FL Hih. iii. p. 230 ; 

 Harv. Phyc. Brit. t. xviii. 



In deep water, on rocks and Algae. Torquay, Mrs. Griffiths. Youghal, 

 Miss Ball. Belfast Bay, and at Ballantrae, Ayrshire, 3Ir. W. Thompson. 



