VIIl] 



MICROCOCCI 



141 



groups of four cells form smaller and larger aggregations. 

 Occasionally small sarcinse occur on boiled potatoes, egg 

 albumen, and gelatine that have been exposed to the air. 

 The cocci of these sarcinse are smaller than those of the 

 sarcina ventriculi ; on cultivation the growth is of a yellow 

 colour and represents the species known as sarcina lutea. 



Fig. 31.— Film Specimen op Pus from Acute Aescess ; amongst Masses of 

 Nuclei, numerous Cocci, single, Diplococci, and Groups. 



As Stated just now, it is widely distributed in air, occasionally 

 is also found in open waters. 



Micrococci connected with disease, or capable of pro- 

 ducing disease in man and animals : — 



T. Staphylococcus pyogenes (Ogston). — In most purulent 

 acute inflammations there occur numerous cocci which 



