186 ALGM RH0D0SPERME7E. [Gloiosiphonia. 



On shells and stones near low-water mark, frequent. Frond 3 — 6 

 inches long, often sub-simple, or once or twice dichotomous, 1 — 2 lines 

 in diameter, very elastic. Axis much denser than in the following, 

 not clearly filamentous ; but rather, as Captain Carmichael expresses it, 

 " a medullary cord." 



2. M. Hudsoni, Ag. Hudso?is Mesogloia. Frond much 

 branched, filiform, pale-reddish ; branches mostly opposite, 

 once or twice pinnate ; ramuli numerous, irregular, obtuse. 

 Harv. in Hook. Br. Fl. v. ii. p. 386. Ulva rubens, Huds. Fl. 

 Angl.p. 571. 



On rocks and Algse in the sea. Bantry bay ; Miss Hutchins. 

 Kilkee, County of Clare, and Killiney ; W. H. Harvey. 4 — 8 inches 

 long, excessively branched, slender, filiform, pale-red. Notwithstanding 

 that the opinion of my valued friend, Mr. Walker Arnott, founded on 

 a specimen from Sir Thomas Frankland, is against me, I am unwill- 

 ing to omit the reference to the U. rubens of Hudson, as given above. 

 In defence of this opinion I have, however, no better plea than that 

 Hudson's description — U. gelatinosa filiformis ramosissima rubes~ 

 cens, rarnis sparsis noris entalibres obtusis" — answers mostly correctly 

 to the present species, and will not apply to any other. 



3. M. purpurea, Harv. Purple Mesogloia. Frond atte- 

 nuated at the base ; branches distichous, linear-fusiform, elon- 

 gated, simple, nearly bare of ramuli. Hook. Br. Fl. v. ii. p. 386. 



Ireland's Eye ; Mr. JR. Ball. I — 2 feet high, robust, purple-red, 

 staining fresh water pink. Ste?n subsimple, irregularly branched. 

 Branches subalternate, distichous, long, simple, patent, constricted at 

 the base, attenuated to a fine point. 



4. M. coccinea, Ag. Moniliform Rose-red Mesogloia. Frond 

 much branched, rose-red ; branches moniliform, irregularly 

 dichotomous, attenuated ; ramuli numerous, crowded round the 

 apex, subattenuate. Harv. in Hook. Br. Fl. v. ii. p. 386. Riv. 

 verticillata. E. Bot. t. 2466. 



Sea-shores, extremely rare. Bantry bay ; Miss Hutchins. Frond 

 2 — 6 inches high, fine rose-red, very gelatinous and delicate. The 

 branches and ramuli are moniliform in consequence of the whorls of 

 filaments forming the periphery being sub-distant. 



28. Gloiosiphonia. Carm. Gloiosiphonia. 



Frond cylindrical, filiform, tubular, somewhat gelatinous ; the 

 periphery composed of radiating, coloured, branched, articu- 

 lated filaments. Fruct. : globules of red seeds, imbedded in 

 the filaments of the periphery, to which they are attached. — 

 Name ; <y\oios, viscid, and aifywv, a tube ; from the gelatinous 

 tubed frond. — This genus, founded on the Fucus capillaris 

 of Turner, was originally proposed by the late Captain Car- 

 michael, in his unpublished " Alga Appinoises," and has 

 been adopted by Mr. Berkeley. Except in the tubular frond, 

 it does not differ from Mesogloia. 



