VAUCHERIA. 195 



irregular ramuli, wliicli 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. Ft. ii. f. 318; Wyatt, Alg. Damn. No. 

 81 ; Harv. Pliyc. Brit. t. cxix. 



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

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

 Hassell. Appin, Caj>t. Carmichael. Torquay, Mrs. Griffiths. Portrush, 

 north of Ireland, Mr. D. Moore. Roundstone, 3Ir. M'Calla. — Frond 

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

 alternate or irregular maimer ; 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 ramuli 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. Frnctification : 

 dark green, homogeneoits sporangia fco?iiocyst(eJ, attached to 

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

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

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



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

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

 Alg. t. 8. V. dichotoma, &. sub?narina, Ag. — Hook. Br. Fl. 

 n.p. 319. 



On the muddy sea-shore, rare. Weymouth, Rev. M. J. Berkelei/. — 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 (e\\, very long, obtuse ; sporangia solitary, obovate, 

 pedicellate, lateral. Carm. — Hook. /. c. p. 319 ; Lyngh. 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, 3Irs. Grif- 

 fiths and 3Irs. 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. sub)narina, subpedicellate. Co- 

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

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



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