50 



SARCINA LUTEA. Schroter. 



YELLOW SARCIXE. 



Origin. Air. 



Form. Larger cocci than the orange sarcine and 

 forms more perfect package-shaped masses. 



Motility. None. 

 Sporulation. None. 



Anilin Dyes. React readily and are likely to over- 

 stain. 



Growth. Very slow. 



Gelatin Plates. Colonies develop very slowly as minute yellowish spots, 

 which show an irregular outline and are markedly granular. The colonies do 

 not liquefy gelatin. 



SticJt Cultures. Gi'owth is especially developed on the surface and ex- 

 tends but slightly down the line of inoculation. Lower half of tube is usually 

 free from growth. The color is bright yellow and in very old tubes liquefaction 

 slowly shows itself, so that eventually a bright yellow deposit forms on the 

 bottom while the liquefied gelatin above is perfectly cjear. 



Streak Cultures. On a<tr, forms a very thick, moist, bright yellow cov- 

 ering. On potatoes, the growth is slow, with production of same color. 



Oxygen requirements. Aerobe. 

 Temperature. May grow in the incubator. 



Behavior to Gelatin. Very slow liquefaction, ap- 

 pearing after lapse of a week or two. 



Pathogenesis. None. 



