GENERAL SYSTEMATIC BACTERIOLOGY 371 



order Cephalotrichinae. The organisms of this genus are described 

 as autotrophic, monotrichic, aerobic short rods capable of oxidizing 

 methane. 



Winslow et al. (Committee Soc. Am. Bact. 1917, p. 551, 1920, p. 

 201) and Bergey et al. (1923, p. 32) describe the genus as follows: 



Monotrichic short rods capable of growing in the absence of organic matter 

 and securing growth energy by the oxidation of methane (forming carbon dioxide 

 and hydrogen). The type species is Methanomonas methanica (Sohngen) 

 Jensen. 



Meyerillus. A generic name proposed by Heller (1922, p. 22) 

 for the fourteenth genus of her tribe Clostridioideae. Her diagnosis is : 



Clostridioideae that produce H2S on blood broth and liquefy gelatin. In meat 

 medium they produce gas, but little or no pink coloration; they show no marked 

 proteolj^tic action. Do not readily attack milk. Large Gram-positive rods with 

 little or no inclination to form spores. Attack a few sugars. Colonies in deep 

 agar large, opaque and lenticular. Typically attack connective tissue more 

 than the muscle. 



Type species M. sadowa nov. sp. To be described in a future paper. This 

 organism was at first taken for B. Welchii. It does not sporulate. It is one of 

 the four guinea-pig invaders isolated from a case of human gas gangrene. I 

 am inclined to place the sporulating bacillus L of Adamson (1919) in this genus 

 but have not handled that organism. Perhaps it is premature to decide whether 

 sporulation may be used as a generic character. Adamson finds bacillus L very 

 slightly proteolytic on milk and not so on other media. M. sadowa does not grow 

 on milk. 



Microbacillus. According to Schamberg (1902, p. 293), Sabouraud 

 named an organism Microbacillus sehorrhoeae. The original references 

 have not been available. 



Microbacteria. According to Enlows (1902, p. 58) used by Billroth. 

 See Microhacterieyi. 



It was used by Cohn (1872, p. 167) to designate his second tribe of 

 bacteria. 



Die zweite Tribus der Bacterien bezeichne ich als Microbacteria oder Stdbchen- 

 bakterien; sie stimmen mit den Kugelbacterien in der Kleinheit ihrer 7i lien und 

 deren zeitweiser Vereinigung zu Gallert-oder Schleimmassen iiberein, unterschei- 

 den sich jedoch, abgesehen von ihrer physiologischen Th/itigkeit, durch die kurz- 

 cylindrische Gestalt und die spontane Bewegung der Zellen. 



This name was also used by Hansgirg (1888, p. 264) to designate the 

 second family of his order Eubacteria Two genera were recognized, 

 Bacillus and Chromobacillus. 



