104 ESSENTIALS OF BACTERIOLOGY 



Stab-cultures. Grows more rapidly, the growth being 

 nearly all on the surface, a few separated colonies following the 

 needle-thrust for a short distance. A gar, a very beautiful 

 yellow, along the stroked surface. 



Sarcina Aurantica. Flava, rosea, and alba are some of 

 the other varieties. Many are obtained from beer. 



Sarcina Ventriculi (Goodsir) (Fig. 41). Origin. Stom- 

 ach of man and animals. 



Fig. 41. Sarcina ventriculi from stomach-contents (X 530) (Van 

 Valzah and Nisbet). 



Form. Colorless oval cocci, in groups of eight and packets 

 of eight. 



Properties. Does not liquefy gelatin; shows tne reaction 

 of cellulose to iodin. 



Growth. Rapid. At end of thirty-six hours, round, yellow 

 colonies, from which colorless cocci and cubes are obtained. 



Habitat. They are found in many diseases of the stomach, 

 especially when dilatation exists. Also normally; increased 

 when fermentation occurs. 



