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The Fundamentals of Bacteriology

Charles Bradfield Morrey

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Book Excerpt: 
. . .h.
Fig. 58.—Illustrates the genus Crenothrix. The thickness of the cell walls is due to deposits of iron hydroxide. (After Lafar.)
Fig. 59.—Illustrates the genus Beggiatoa. The filament A is so full of sulphur granules that the individual cells are not visible. B has fewer sulphur granules. In C the granules are nearly absent and the separate cells of the filament are seen. (After Winogradsky, from Lafar.) ORDER I. Eubacteria.

Cells without nuclei, free from sulphur granules and from bacteriopurpurin (p. 112); colorless, or slightly colored.

1. Family: Coccaceæ (Zopf) Migula, all cocci. Non-flagellated, Non-motile   Genus 1. Streptococcus Billroth: division in one plane only (Fig. 49). Genus 2. Micrococcus (Hallier) Cohn: division in two planes only (Fig. 50). Genus 3. Sarcina Goodsir: division in three planes only (Fig. 51). Flagellated. . . Read More