466 GENERAL SYSTEMATIC BACTERIOLOGY 



In Siderocapsa major the cells are coccus-like short rods united into 

 colonies of 2 to 100 cells 5 to 28ju in diameter. The cells are 0.7 to 

 l.SjLi long. 



The organism does not appear to have been grown in culture media. 



Sideroca'psa is probably a vaHd generic designation, with Sidero- 

 capsa treubii Molisch as the type. 



Siderocapseae. A name given by Buchanan (1917, p. 615) to the 

 third tribe of the Coccaceae with the description: 



Cells spherical or ovoid, non-motile, epiphytic upon the leaves and other parts 

 of water plants. Have not been cultivated. Thick capsules enclosing the cells 

 become encrusted with iron oxid. 



One genus only has been described, Siderocapsa. 



Siphonomyxa. A generic name used by Billroth (1874, p. 27) for 

 his Siphonomyxa Nosocomii Viennensis an organism, apparently one 

 of the iron bacteria found in a tap water. He regarded it as a 

 pleomorphic organism resembling his Coccohaderia septica, but distinct 

 from it. The name would appear to be invalid, as it is used in a 

 trinomial, and the description does not make it possible to recognize 

 the original. 



Solidococcus. A generic name proposed by Orla-Jensen (1909, 

 p. 332) to include cocci which do not as a rule require organic nitrogen, 

 and which belong to the family Luminibacteriaceae of the order Cepha- 

 lotrichinae, and do not liquefy gelatin. 



The generic name is probably a synonym of Micrococcus. 



Solidovibrio. A generic name proposed by Orla-Jensen (1909, p. 

 333) to include short spiral organisms which do not as a rule require 

 organic nitrogen, which often reduce sulfates to hydrogen sulfid, and 

 which do not Uquefy gelatin. The description is as follows: 



Als Schraubenformen, die sich aus der Gattung Denitromonas entwickelt haben> 

 rechne ich die erwiihnten sulfatreduzierende Vibrionen; denn das Reduktions- 

 vermogen von Nitrat und von Sulfat miissen ja verwandte Eigenschaften sein. 

 Die weitere Entwickelung dieser bereits spirillenahnlichen Vibrionen, Solidovi- 

 brio, fiihrt zu den echten (schwefelfreien) Spirillen. Ein wesentlicher Unter- 

 schied zwischen den monotrichen Vibrionen und den lophotrichen Spirillen 

 existiert nicht; denn es ist selbstverstandlich, dasz, wahrend dem die kiirzeren 

 Bakterien mit unvoUstandigen Schraubengang sich mit einer einzigen Geissel als 

 Propell begntigen konnen, so miissen die langeren, starker gewundenen Formen 

 einen ganzen Biischel haben. Die Gattungen Solidovibrio and Spirillum wollen 

 wir zur Familie Reducibacteriaceae sammeln. 



The generic name is probably to be regarded as a synonym of Vib- 

 rio iq.v.). 



