SUMMARY: A droplet of a suspension of in a concentrated brine when left to dry on a collodion-covered grid yields a useful preparation for electron microscopy. Two strains, one red and one pink, were examined. Both strains have polar tufts of flagella. The cell wall contains a single layer of hexagonally arranged globular particles. has these characteristics in common with spp., but unlike the true spp. it is rod-shaped.

Electron microscopical examination showed that the gas vacuoles observed by Petter (1931, 1932) to be a feature of pink strains of actually were smaller but much more numerous than the optical microscope revealed. Stereo-pictures show that these vacuoles did not collapse upon desiccation of the bacteria.


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