2 I 8 BACTERIOLOGY. 



proved fatal to mice in about a week, producing 

 purulent inflammation and abscess in the lungs. 

 Fresh inoculations in mice again produced a fatal 

 .result with pysemic symptoms. 



Micrococcus amylivorus, Burrill. Oval cells, 

 i i '4 p. long, *7 JJL broad, singly, in pairs, and 

 rarely in fours, never in chains, are found em- 

 bedded in an abundant mucilage which is very 

 soluble in water. They have been described as 

 producing the so-called " fire blight" of the pear 

 tree and other plants. 



Micrococcus cyaneus, Cohn (Baderidium 

 cyaneum, Schroter). Elliptical cells, growing upon 

 cooked potato, and producing a blue colour. In 

 nutrient solutions they form zooglcea, at first 

 colourless, then bluish-green, and finally intense 

 blue. 



Micrococcus aurantiacus, Schroter. Cocci, 

 oval, i '5 //, in diam., singly or in pairs, or in 

 zooglcea. They occur as orange-yellow spots which 

 coalesce into patches. A golden-yellow pellicle 

 develops when they are cultivated in nutrient 

 liquids. The colouring matter is soluble in water. 

 They were observed on boiled potatoes and white 

 of egg. 



Micrococcus chlorinus, Cohn. Cocci occur 

 in the form of a finely granular zoogloea, causing a 

 yellowish green or sap-green layer on boiled eggs 

 and nourishing solutions. The colouring matter 

 is soluble in water and is decolorised by acids. 



