Phycologia britannica, or, A History of British sea-weeds, containing coloured figures, generic and specific characters, synonymes, and descriptions of all the species of algae inhabiting the shores of the British Islands . ns, on the same authority, is only therudimentary state of an Enteromorpha; and this I am disposedto allow. A curious point in the history of Bangia fmco-purpurea is, thatit is found equally in the sea, and in fresh-water rivers andcanals, reaching an equal degree of development and colorationin either situation. Such an indifference is very unusual amongthe Algse; but I ca
Phycologia britannica, or, A History of British sea-weeds, containing coloured figures, generic and specific characters, synonymes, and descriptions of all the species of algae inhabiting the shores of the British Islands . ns, on the same authority, is only therudimentary state of an Enteromorpha; and this I am disposedto allow. A curious point in the history of Bangia fmco-purpurea is, thatit is found equally in the sea, and in fresh-water rivers andcanals, reaching an equal degree of development and colorationin either situation. Such an indifference is very unusual amongthe Algse; but I can perceive no sufficient distinctions betweenthe fresh-water and marine specimens to found a separate speciesupon. Prof. Kiitzing, however, describes the fresh-water formunder two names, B. coccineo-purpurea and B. roseo-purpurea;relying chiefly on the habitat, and some slight difference ofcolour. I fear these species cannot stand. * Recherches sur lorganization, la fructification et la classification de plusieursgenres dalgues, &c.: Caen, 1842. Fig. 1. Bangia fusco-purpurea :—of the natural size. 2. Portions of fila-ments :—magnified. 3. A transverse section of a filament:—highly magnified. IUh Ser. ChlorospermejE. Fam. Ulvacece. Plate CCCXXII. BANGIA CILIARIS, Cam. Gen. Char. Frond filiform, tubular, composed (in typical species) ofnumerous, radiating cellules, disposed in transverse rows, and en-closed within a hyaline, continuous sheath. Spores purple or green,one formed within each of the cells of the frond. Bangia (Lyngb.),—in honour of Hoffman Bang, a Danish botanist and friend ofLyngbye. Bangia eiliaris; filaments gregarious, very minute, simple, straight, com-pressed, purple; grains two or three in each transverse band, globose,sometimes solitary. Baxgia eiliaris, Carm. MSS. Hook. Br. Fl. vol. ii. p. 316. ffarv. 1. p. 172. ed. 2. p. 218. Chauv. Reclwrches, p. 37. Goniotrichum ceramicola, Var. a. simplex? Kiitz. Sp. Alg. p. 358. (so faras refer
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Keywords: ., bookauthorharveywilliamhwilliam, bookcentury1800, bookdecade1840
