440 GENERAL SYSTEMATIC BACTERIOLOGY 



sugars less vigorously and does not make meat infusion alkaline. 

 Produces indol and nitrites. Pathogenic for mouse, guinea-pig, rabbits 

 and pigeons. Animal infected intravenously quickly succumb to 

 septicemia. In subcutaneous inoculation there is pus production 

 (abscess formation). 



Pyococcus. A term used by Ludwig (1892, p. 27) as a synonym of 

 Staphylococcus. It evidently has not been used as a generic designation. 



Radiobacter. A name occasionally used in a pseudo-generic sense 

 in reference to Bacillus radiobacter, as by Stoklasa (1908, p. 484). 



Radiococcus. A name used by Maggi (1886, p. 81) to designate a 

 growth form of his Micrococcus aceti. 



Rasmussenia. A genus of bacteria created by De Toni and Trevisan 

 (1889, p. 930) to include the slender filamentous bacteria of the mouth 

 usually known as Leptothrix. The generic diagnosis is as follows: 



Filamenta cylindrica, vagina tenui gelatinosa facile evanescente obducta, 

 simplicia, basi subiculo zoogloeico affixa, articulata, articulis aetate provecta in 

 baculos et coccos solutis. Multiplicatio baculis primitus vivacites mobilibus, 

 cito immotis. Arthrosporae transformatione cocci singuli ortae. 



Five species are described: R. gigantea, R. huccalis, R. maxima, 

 R. anceps and R. variabilis. The type first described may probably 

 be regarded as Rasmussenia gigantea (Miller) Trevisan, from the mouth. 



Clements (1894, p. 28) is apparently the only other author who has 

 used this generic designation. His generic description is: "Cells 

 elongate-cylindrical, flexuose, simple, with a thin, gelatinous sheath, 

 often separating into bacilli or cocci, from which the arthrospores arise." 



One species is described, Rasmussenia buccalis (Rob. and Leb.) 

 Trev. 



Unless the type, R. gigantea (Miller) Trevisan is so different from 

 R. buccalis (Rob. and Leb.) Trev. as to warrant genera for the two 

 species, the genus Rasmussenia is a synonym of Leptotrichia q.v. of 

 which L. buccalis is the type. 



Recordillus. A name proposed by Heller (1922, p. 26) for a genus 

 of the tribe Putrificoideae with the following description. 



Putrificoideae that, though they sporulate, are exceedingly delicate and soon 

 die in meat medium and other media. Their growth in meat medium resembles 

 that of the organisms of genus Martellilhis, they do not produce much gas, they 

 color the meat particles a greyish color and form a blackish pigment. Gram- 

 negative rods with central or subterminal cocoon-shaped spores. Parasitic 

 forms which infect cattle in California and Nevada. I venture to place such 

 organisms in a separate genus on account of their parasitic habit and on account 



