Myrionema.'] -ALO/E CHLOROSPERME.E. 



223 



branched. Harv. in Hook. Br. Fl. v. ii. p. 389.— Ulva i?icras- 

 sata, E. Bot. *. 967. 



In lakes and streams, attached to stones. 



2. C. tuberculosa, Hook. Tubercular Chcetophora. Frond 

 at first globose and firm, afterwards much lobed, fragile and 

 hollow; filaments very slender, flexuose, hyaline; ramuli co- 

 loured, palmato-fasciculate. Harv. i?i. Hook. Br. Fl. v. ii. p. 389. 

 — Rivularia tuberculosa, E. Bot. t. 2366. 



In bogsry pools. 



3. C. elegans, Ag. Elegant Chcetophora. Frond subglo- 

 bose, gelatinous, solid, green; filaments subdichotomous ; ra- 

 muli fastigiate, attenuate; the apices produced beyond the 

 gelatine. Carm. — Harv. in Hook. Br. Fl. v. ii. p. 389. 



In stagnant pools. 



2. Marine, crustaceous. 



4. C. pellita, Lyngb. Purple Crustaceous Chatophora. 

 Frond purple-brown, crustaceous, gelatinoso-coriaceous, inde- 

 finitely spreading. Harv. in Hook. Br. Fl. v. ii. p. 390. Berk. 

 Alff.t.l.f.3. 



Rocks and stones in the sea. Miltown Malbay ; W. H. Harvey. 



62. Myrionema. Grev. Myrionema. 



Mass gelatinous (exceedingly minute), effused, composed of 

 very short, clavate, erect, mostly simple filaments, "fixed at 

 their base to a thin expansion." (Grev.) Fruit: capsules 

 at the base among the filaments. — Name ; fivpiov, a thousand, 

 and f7jf.ia, & filament. 

 1. M. strangulans, Grev. Convex Myrionema. " Subcon- 



vex, confluent ; filaments subcylindrical ; capsules shortly pedi- 



cellated, " affixed to the basal lamina." Grev. Crypt, t. 300. 



Harv. in Hook. Br. FL v. ii. p. 391. 



On various Algae, parasitical. 1 — 2 lines in diameter, brown. 



Tribe XVII. CONFERVEiE. 



Plants growing in the sea or in fresh water, filamentous, arti- 

 cidate, without definite gelatine. Fronds very variable in ap- 

 pearance, simple or branched; articulatiotis more or less filled 

 with a green, very rarely brown or purple, granular mass, which 

 affects various forms, and is supposed to be of a sporaceous 

 nature. 



