228 CLASSIFICATION OF THE MICRO-ORGANISMS. 



Sarcina then representing a true sarcina. The Sarcina lito- 



lis, &c. ra -fa g Reitenlachii hyalina, formerly reckoned here, has 

 apparently only a merismopedia-like arrangement of 

 the cells, and its other characters as well as its relation- 

 ship to the algae or to the hacteria are as yet doubtful. 



In pus, secretions, &c., of the human body, the 

 following micrococci have also been occasionally observed 

 as saprophytic parasites ; their characteristics must 

 however be more fully worked out. 



Micrococcus cereus albus. 



Cocci 1'16 /n. in diameter, single or in groups, at 

 times also arranged in short chains. They form white 

 points on gelatine plates during the first few days ; these 

 subsequently spread out on the surface and ultimately 

 attain a size of 1 2 mm. In stroke inoculations a white, 

 dull stearin or waxy-like layer is formed with somewhat 

 thickened, irregular margins. On blood serum a greyish 

 white dull line appears along the line of inoculation ; 

 on potatoes a greyish white layer of medium thickness. 

 Found by Passet on pus, but probably without pyogenic 

 properties, as injections and inoculations of the culti- 

 vations into animals produced no results. 



Micrococcus cereus flavus. 



Microscopical characters and growth in cultivations 

 like the foregoing, only the colour of the colonies soon 

 passes from the original white to a dark citron yellow. 

 Also isolated by Passet from pus ; without pyogenic 

 action. 



Micrococcus citreus conglomerates. 



Observed by Bumm in pus from blennorrhoea, and 

 also in dust from the air. Forms firmly agglomerated 

 masses which resemble tuberculated knobs ; if these are 

 crushed and diluted with much water we see diplococci, 



