BatrachosjJermum.) ALGiE GLOIOCLADE^. 387 



2. Olive -green. 



6. M. vermiciddris, Ag. ( Worm-like Mesogloia) ; brandies 

 irregularly pinnate thick vermicular linear-fusiform, ramuli 

 copious elongated flexuose resembling the brandies. — Ag. Si/si, 



Alg. j). 51 Rivularia vermieulala, E. JBot. t. 1818. — Uha 



rubens, Huds. Fl. Angl.p. 571, (according to Mr, Arnott.) 



Coasts of England, Scotland, and Ireland, in many places, common. — 

 1 — i feet high, the branches widely spreading, 1 — 2 lines broad, clumsy, 

 flexuose and attenuated towards each end. Substance firmly gelatinous 

 or sub-cartilaginous, elastic. " Whether we consider the character" U. 

 gelatinom filiformis ramosissima rubcscens, ramis spurns horizontalibus ob- 

 tusis," given by Hudson to his U. rubens, or rely on the specimen I pos- 

 sess from Sir T. Frankland in Mr. Brodie's herbarium, and compared with 

 Hudson's plant, there can be no doubt but that species must be referred 

 to M. vermicular is." Arn. 



7. M. Griffithsiana, Grev. MSS. (Mrs. Griffiths 1 Mesogloia); 

 brandies alternate or irregular very slender filiform long sim- 

 ple nearly bare of ramuli. 



Sidmouth, Mrs. Griffiths, — 8 — 1G inches high, of a pale rather olive 

 green, which becomes greener in fresh-water : frond subsimple, beset 

 throughout with very long, slender, simple, opposite or alternate branches^ 

 its surface covered with long colourless byssoid fibres, similar to what 

 occur in ChordariaJlageUiformis. " Many fronds grow from the same base, 

 waving most beautifully in the water; and the long radiating fibres make 

 the plant appear much larger than it really is." Mrs. Griffiths , in lit!. — 

 The habit of this species is decidedly that ofChordariaJlagelliformis; a 

 plant which Mrs. Griffiths considers genetically allied to Mesogloia} in 

 which opinion I fully coincide, although I know I stand opposed to my 

 friend Dr. Greville and the bulk of Algologists. 



8. M. viriscens, Carm. (greenish villous Mesogloia); branches 

 long erecto-patent filiform villose, ramuli numerous patent short 

 flexuose obtuse. 



Appin, Capt. Carmichael. Sidmouth, Mr.;. Griffiths. — 8 — 12 inches 

 high, olive-green, tender, >_ r clatin<>iis, slippery, excessively branched ; 

 branches long, simple or forked, furnished with numerous alternate or 

 secund, divaricating, flexuose ramuli. Frond to the naked eye appear- 

 ing Villose, owing t<> the filament- composing the periphery being VWJ 



much protruded beyond the gelatine, and accompanied also by hyaline 



fibres, similar to those of M. Griffilhsiana, 



86. BATRACHOSPiRMUM. Ttoth. IJat radio. permum. 



Main filaments invested with gelatine, hyaline, tubular, longi- 

 tudinally striated, composed of colourless jointed fibres agglu 



1 'mated log ot her, beset with distant whorls of m on ili form ramiri. 



Fructification j </l<il>ul<s of * ds seated in the whorls — Name-. 

 . '-/ :. a froffi ami frog-spaum, which the species 



much resemble* — " In this genus the stem ami primary branches 

 ot' the frond are made up of a bundle of confervoid fibres, 

 tinated together; while the ultimate branches, h sreU as the 



