14 



THE ORGANISM IS A MICEOCOCCUS. 

 THE GELATINE IS LIQUEFIED EAPIDLY. 

 THE COLONIES ABE YELLOW. 

 THE COCCI AEE IN MASSES. 



Staphylococcus pyogenes aureus, from pus in acute abscesses and in 

 suppurative processes generally ; cocci '8 to "9 ^ in diameter ; 

 grows rapidly at ordinary temperature, forming orange-yellow 

 colonies ; stains weU with the aniline stains and by Gram. 



Staphylococcus pyogenes citreus, resembles the above ; the colonies 

 formed are, however, of a lemon colour, and the liquefaction is 

 not quite so rapid. 



Micrococcus coronatus, cocci 1 to 1"2 n in diameter, singly or in 

 chains; the colonies appear as whitish -yellow points, sur- 

 rounded by a zone of depression, with radiating processes. 



Micrococcus flavus lictuefaciens (Flugge), from air and water ; large 

 cocci in pairs or masses ; forms small yellow colonies with a 

 granular surface, with lines radiating from centre to circum- 

 ference ; the liquefying jelly remains clear, with a yellow 

 deposit. 



Micrococcus fuscus (Maschek), from water; elliptical cocci, sometimes 

 even appearing as short rods. 



Micrococcus cremoides, from water ; cocci -8 /lia diameter, arranged 

 in grape-like masses growing in concentric rings with dehcate 

 radiating processes. 



Micrococcus of Almo[uist, obtained from the buUse of pemphigus 

 neonatorum ; cocci 0'5 to 1 fi in diameter, usually in pairs ; 

 resembles Staphylococcus pyogenes aureus in its morphology 

 and growth. 



