BACTERIOLOGICAL DIAGNOSIS. 757 



V. Micrococci which multiply by division in two directions, forming 



diplococci and tetrads. 



A. Grow in nutrient gelatin at the room temperature, and liquefy 



the gelatin. 



a. Chromogenic ; pigment yellow : 



Diplococcus citreus conglomeratus (163). 

 Micrococcus tetragenus versatilis (220). 



b. Non-chromogenic : 



Micrococcus acidi lactici liquefaciens (186). 

 Pediococcus albus (221). 



B. Grow in nutrient gelatin at the room temperature and do not 



liquefy. 

 Non-chromogenic : 



Pediococcus acidi lactici (222). 



Micrococcus tetragenus mobilis ventriculi (224). 



Pediococcus cerevisisB (223). 



Micrococcus tetragenus (18). 



C. Do not grow in nutrient gelatin at the room temperature : 



Micrococcus tetragenus subflavus (225). 

 Micrococcus gonorrhoeas (6). 



VI. Micrococci which multiply by division in three directions, form- 



ing cubical ' ' packets " sarcince. 



A. Grow in nutrient gelatin at the room temperature, and liquefy 



the gelatin. 



a. Chromogenic ; pigment yellow : 

 Sarcina aurantiaca (226). 

 Sarcina lutea (227). 

 Sarcina flava (228). 



a. Pigment red : 



Sarcina rosea (229). 

 Sarcina mobilis (457). 



b. Non-chromogenic: 



Sarcina alba (230). 

 Sarcina Candida (231). 



B. GroAy in nutrient gelatin at the room temperature, and do not 



liquefy. 

 Non-chromogenic : 



Sarcina ventriculi (233). 

 Sarcina pulmonum (232). 



