VAUCHERIA. 195 



irregular ramuli, which gradually diminish in length to the apex. Colour 

 a fine deep green. Substance lubricous and adhering to paper. A beau- 

 tiful plant, whose branches resemble beautiful, glossy, bright green feathers. 



2. B. hypnoides, Lamour. ; frond slender, very much 

 branched ; the branches long ; the ramuli capillary, irregu- 

 larly inserted, somewhat erect, the lower ones elongated. 

 Grev.Hook. Br. Fl. ii. p. 318; Wyatt, Alg. Danm. No. 

 81 ; Harv. Phyc. Brit. t. cxix. 



On rocks and stones in tide-pools, and on the larger Algae, rather rare. 

 Southerness, Kirkcudbright, Sir W. Jardine, Bart. Frith of Forth, Mr. 

 Hassell. Appiu, Capt. Carmichael. Torquay, Mrs. Griffiths. Portrush, 

 north of Ireland, Mr. D. Moore. Roundstoue, Mr. M'Calla. Frond 

 2 4 inches high, much branched, the branches repeatedly divided in an 

 alternate or irregular manner ; lesser branches set with irregularly scat- 

 tered, somewhat pinnate, more or less dense ramuli. Colour a fine yellow 

 green. This is a more slender, very much more branched plant than the 

 preceding, and the rarnuli are irregularly scattered, sometimes issuing from 

 all sides of the filaments. 



III. VAUCHERIA. De Cand. [Plate 24, C.] 



Fronds aggregated, tubular, continuous, capillary, coloured 

 by an internal, green, pulverulent mass. Fructification : 

 dark green, homogeneous sporangia ( coniocysta) , attached to 

 the frond. Grev. Named in honour of M. Vaucher, a dis- 

 tinguished writer on fresh- water Conferva. (The species are 

 natives of fresh water, with the following (British) exceptions). 



1. V. submarina, Berk. ; frond capillary, forked, fastigiate; 

 sporangia scattered, ovate or lanceolate, sessile. Berk. Gl. 

 Alg. t. 8. V. dichotoma, @. submarina, Ag. Hook. Br. FL 

 ii. p. 319. 



On the muddy sea-shore, rare. Weymouth, Rev. M. J. Berkeley .Tufts 

 2 or 3 inches high, not diffused, fastigiate ; filaments much more slender 

 than in V. dichotoma, less branched, the branches more irregular. Vesicles 

 numerous, scattered over the upper branches. 



2. V. marina, Lyngb. ; filaments loosely tufted or distinct, 

 branches few, very long, obtuse ; sporangia solitary, obovate, 

 pedicellate, lateral. CarmHook. I. c. p. 319 ; Lynyb. t. 22 ; 

 Wyatt, Alg. Danm. No. 168. 



In the sea. Annual. Summer. Parasitical on Furcellaria lumbricalis, 

 Appin, Capt. Carmichael. On mud at Torbay and Salcombe, Mrs. Grif- 

 fiths and Mrs. Wyatt. Fronds tufted or somewhat spreading, erect, very 

 slender and flaccid, irregularly branched, somewhat forked ; the branches 

 erect. Vesicles few, scattered, broadly obovate and very obtuse, by which 

 character it is easily distinguished from V. submarina, subpedicellate. Co- 

 lour-bright green, becoming rather brownish, but retaining a gloss in drying. 

 Mrs. Griffiths has kindly presented me with specimens in fructification. 



o 2 



