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Caption: Board of Trustees Minutes - 1882
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146 sulphur springs where they decompose, the dissolved sulphur compounds in the water and give off free sulphureted hydrogen. F o r this reason such water with Beggiatoa put into a stoppered bottle, develops an extremely intense odor of sulphureted hydrogen. The supposed species of Beggiatoa are of very uncertain value; they are distinguished by very little else than the diameter of the threads. B . a l b a , Trev. Synonyms: Beggiatoa punctata, Trev. (Flora Enganea, p. 56); Oscillaria alba, Vauch (Conferv, p. 198, T. XV, Fig. 11): Hygrocrocis Vandelli, Menegh, (Kiitzing's Algae exsc. No. 16-Tab. phycol. I, T. XXXVllI, Fig. 3). Exsiccata: Wartmnn und Schenk, Schweiz. Kryptog. 639. Filaments without evident joints, forming dirty or chalky-white slimy masses; .00012 to .00014 in. thick. In sulphur springs and swamps. V a r . m a r i n a , Conn. Filaments densely filled with blackish granules, only .00008 thick. In a salt-water aquarium, forming a snow-white, then slimy membrane on dead animals and algae. B . n i v e a , Rabh. Synonym: Leptonema niveum, Rabh. (Alg. Decad. 653). Filaments very slender, obscurely jointed; .00004 to .00006 in. thick (according to Eabenhorst) forming flocks of snow-white color. In sulphur springs. In Wartmann and Schenk's Swiss Cryptogams/639, this species is given under the name of Symphyothrix nivea, Brugger. Both the above names are cited, pari passu, as synonyms. I take the following from their description: "Filaments not polished, without joints, also without movement, only .00002 to .000052 thick, parallel and variously entwined, united in pencil-like tufts, strings and bundles of very unequal thickness, which are enveloped in a common, homogeneous slime-mass." B . l e p t o m i t i f o r m i s , Trev. Synonym: Oscillaria leptomitiformis, Menegh. (Ragazz. Nuovo ricerch. fisico-chim.. p. 122.-Kutzing, Tab. phycol. I. T. XXXVIII, Fig. 1.) Exsiccata: Rabenhorst's Algen, 1813. Filaments very slender, obscurely jointed, .00007 to .00010 in. thick; forming a thin chalk-white slimy layer. In sulphur springs. B . a r c h n o i d e a , Rabh. Synonyms: Oscillaria archnoidea, Ag, (Regensb. "Flora," 1827, p. 634, No. 38.) versatilis, Kutz. (Phycol. gener. p. 184). Oscillaria Filaments rather thick, evidently jointed, with rounded, slightly curved ends; movements active. Joints as long, or half as long as thick. Filaments .00020 to .00026 in. thick, forming a very thin, cob-webby, chalk-white, slimy pellicle. In sulphur springs and swamps.
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