Bacillus subtilis, Cohn, and Spirillum undula, Ehrenb.
P. syncyanea (Ehrenb.), Migula.
undula (Mtill er), Ehrenb.
Divisions perpendicular to the long axis: - Vibrio (Muller-Ldffler), commashaped, motile, monotrichous; Spirillum (Ehrenb.), more strongly curved in open spirals, motile, lopho trichous; Spirochaete (Ehrenb.), spirally coiled in numerous close turns, motile, but apparently owing to flexile movements, as no cilia are found.
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