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MANUAL OF DETERMINATIVE BACTERIOLOGY 



FAMILY I. NEVSKIACEAE HENRICI AND JOHNSON. 

 (Jour. Bact., 29, 1935, 4; ibid., 30, 1935, 83.) 



Stalked bacteria, the long axis of the rod-shaped cells being set at right angles to 

 the axis of the stalk. Stalks lobose, dichotomously branched, composed of gum. 

 Multiplication of cells by transverse binary fission. Growing in zoogloea-like masses 

 in water or in sugar vats. 



There is a single genus Nevskia. 



Genus I. Nevskia Famintzin. 



(Bui. Acad. Imp. Sci., St. Petersb., 34, N.S. 3, 1892, 484.) From the Neva River 

 at St. Petersburg. 

 Description as for the family. 

 The type species is Nevskia ramosa Famintzin. 



1. Nevskia ramosa Famintzin. (Bui. 

 Acad. Imp. Sci., St. Petersb., Ser. IV, 

 34, N.S. 2, 1892, 484.) From Latin ramo- 

 sus, branched. 



Globular, bush-like or plate-like col- 

 onies of gummy consistency floating 

 upon the surface of water. Colonies 

 composed of gummy material arranged 

 in dichotomously branched stalks arising 

 from a common base, with the bacterial 

 cells contained in the gum, a single cell 

 at the tip of each stalk. At times cells 

 arc set free from the stalks to start new 

 colonies. 



Rod-shaped cells set with their long 

 axis at right angles to the axis of the 

 broad lobe-like stalk. Cells 2 by 6 to 

 12 microns, containing a number of 

 highly refractile gloljules of fat or sulfur. 



Multiplication by binary fission. Xot 

 cultivated on artificial media. 



Source: From the aquarium in the 

 Botanical Garden, St. Petersburg. Sim- 

 ilar but smaller organisms found by Hen- 

 rici and Johnson (Jour. Bact., 30, 1935, 

 63) in a jar of water from the lily pond 



of the University of Minnesota green- 

 house in Minneapolis. 

 Habitat : Water. 



2. Nevskia pediculata (Koch and Ho- 

 saeus) Ilenrici and Johnson. {Bac- 

 terium, pcdiculalum Koch and Hosaeus, 

 Cent. f. Bakt., 16, 1894, 225; Henrici 

 and Johnson, Jour. Bact., 30, 1935, 83.) 

 From Latin pediculus, diminutive of pes, 

 foot. 



Composed of twisted, short, thick, 

 sausage-like strands, often branched. 

 These strands are stalks, composed of 

 gum. 



The cells occur at the tips of the stalks 

 and are smaller than those of Nevskia 

 ramosa and arc without internal globules. 

 Not cultivated. 



This organism is very similar to, and 

 may be identical with, the cultivated 

 species described and named Betabac- 

 terium vermiforme by iNIayer (Das Tibi- 

 Konsortium. Thesis, Utrecht, 1938). 

 See p. 362. 



Source: Found growing in the syrup 

 of a sugar refinery as zoogloeae. 



PWMILY II. GALLIONELLACEAE HENRICI AND JOHNSON. 



(Jour. Bact., 29, 1935, 4; ibid., 30, 1935, 83.) 

 Stalked bacteria, the long a.xis of the rod-shaped cells being set at right angles 

 to the axis of the stalks. Stalks are slender, twisted bands, dichotomously branched, 

 composed of ferric hydro.xide, completely dissolving in dilute hydrochloric acid. 

 Multiplication of cells by transverse binary fission. Grow in iron-bearing waters. 

 There is a single genus Gallionella. 



