208 COMMITTEE REPORT 



of yellow pigment. Glucose broth slightly acid, lactose broth 

 generally neutral. Gelatin frequently liquefied, but not rap- 

 idly. 



The type species is Micrococcus luteus (Schroeter) 1872b, Cohn. 



Genus 7. Sarcina Goodsir 1842, p. 432, emended Winslow and 



Rogers 1905, p. 359 



Synonyms: Urosarcina Miquel 1879; Planosarcina Migula 1894; Pseu- 

 dosarcina? Maze 1903; Tetradiplococcus? Bartoszewicz and Schwarz- 

 wasser 1908; Lactosarcina Beijerinck 1908; Sporosarcinaf Jensen 

 1909. 



Sarcina differs from Micrococcus solely in the fact that cell 

 division occurs under favorable conditions in three planes, form- 

 ing regular packets. 



The type species is Sarcina ventriculi Goodsir. 



Genus 8. Rhodococcus Zopf 1891, p. 28, emended Winslow and 



Rogers 1906, p. 546 



Synonyms: Not Rhodococcus Molisch 1907. 



Saprophytes. Cells in groups or regular packets. Generally 

 decolorize by Gram. Growth on agar abundant with formation 

 of red pigment. Glucose broth slightly acid, lactose broth neu- 

 tral. Gelatin rarely liquefied. Nitrates generally reduced. 



Type species, Rhodococcus rhodochrous Zopf. 



Family V. Bacteriaceae Cohn 1872b, p. 231 

 Emended Committee 1917c, p. 560 



Rod-shaped cells without endospores. Usually Gram-negative. 

 Flagella when present peritrichic. Metabolism complex, amino- 

 acids being utilized, and generally carbohydrates. 



Tribe 1. Chromobactereae, Nov. Trib. 

 Water bacteria producing a red or violet pigment. 



