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Caption: Board of Trustees Minutes - 1882
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150 SPIRILLUM, EHRB. (Abhand. d. Berl. Akad. 1830, p. 38). Vibrio, Cohn. (Beitr. z Biol. I, Bd. 2, Heft, p. 178.) Ophidomonas, Ehrb. (Infs. p. 43.) Cells cylindrical or somewhat compressed, with a single arch-form curve or spirally wound; rigid; furnished at each end with a cilium (not certainly observed in all the species); multiplying by transverse division, the parts soon * separating from each other. The formation of zoogloea and of spores as in the species of Bacillus sometimes occurs. I unite with Spirillum the genera Vibrio, Cohn, Ophidomonas, Ehrb. The genus Vibrio does not indeed permit of sharp definition since their cilia have been found. Cohn himself has united Ophidomas with Spirillum. Warming also shows that all three genera are the same. Although the name Vibrio has the priority, I have chosen Spirillum because with the first, aside from its being nonbotanical, misuse has been practiced, so that it is better to drop it altogether. S. rugula", Winter. Synonyms: Vibrio rugula, Muller (Infs. p. 44, T. VI, Fig. 2.) Melanella flexuosa, Bory (Encycl. method, 1824.) Cells .00024 to .00064 in. long, .00002 to .00010 in. thick; either only one curve or one flattened spiral turn, bearing a cilium at each end, actively rotating around their long axis; the cells often felted into dense swarms; height of a spiral mostly .00024 to .00040 in., diameter .00004 to .00008 in.; globular spores always formed at the ends of the cells. In swamp water and various infusions; also in the slimy material on the teeth, &c. According to Warming some specimens attain a height of single spiral of .00050 to .00080 in., and diameter of .00010 to .00020 in. S. s e r p e n s , Winter. Synonym: Vibrio serpens, Muller (Infs. T. VI, Fig. 7 and 8.) Cells half as thick as the preceding species, .00045 to .00112 in. long (according to Eabenhorst) .00003 to .000045 in. thick, with more usually three to four spiral turns; often joined in long chains; furnished with a cilium at each end; also often collected in swarms; height of a single spiral .00030 to .00050 in.; diameter, .00005 to .00012 in. In various infusions. Rabenhorst's measurement of the length, .00092 to .00112 in., probably applies to the whole filament consisting of several cells. According to Warming the height of a single spiral sometimes attains .00088 in. S. t e n u e , Ehrb. (Infs. p. 84, T. V, Fig. 11). Cells very slender, .00016 to .00060 in. long, .00010 in. thick (according to Ehrenberg), with at least one and a half, usually two,
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