lo Synopsis of the Bacteria and Yeast Fungi. 



acid reaction after a few days, becomes neutral, and finally alkaline, 

 while the phenomena of fermentation are observed. The urea disappears 

 and is changed into catbonate of ammonia, while at the same time 

 alkaline urates and phosphate of ammonia and magnesia are eliminated. 

 This decomposition takes place only when the Micrococcus is developed 

 in the fluid. 



9. M. Crepusculum (Ehrenberg), Cohn {I.e., p. 160). 



Monas Crepusculum, Ehrenberg. 

 \|';!"'» Cells round or shortly oval, very small, 



°:°'^^$' scarcely 2 ;* in diameter; isolated or forming 

 Fig. ^.— Micro- a zoogloea. (Fig. 3.) 

 TuiZf^XZr In and on various infusions and putrefying 



Ehrenberg). fluids. 



The common form of Micrococcus, which appears in all sorts of 

 decaying substances and in infusions, in company with Bacterium 

 Termo. 



10. M. candiduSj Cohn {I.e., p. 160). 



On boiled potato-slices, forming snow-white points and 

 spots. 



[i I. M. amylivorus, Burrill (Ameriean Naturalist, xvii., 

 1883, p. 319). 



Cells oval, single or united in pairs, rarely in fours, never 

 in elongated chains, embedded in an abundant mucilage 

 which is very soluble in water, i-i -4 /a long, 7 /^ broad ; 

 width of a pair 2 /*, of four united about 3 ju. j movements 

 oscillatory. 



In the tissues of plants, causing the so-called " fire-blight " 

 of the pear tree, and similar phenomena in other plants. 



Through the action of this organism, the stored starch is destroyed 

 by fermentation, and carbonic acid, butyric acid, and hydrogen are 

 given off. It may be cultivated in pure starch, in water maintained at 

 the temperature of ordinary summer weather.] 



