174 



A MANUAL OF BACTERIOLOGY 



Transient, a few days. 



Turbid, cloudy, with flocculent particles ; cloudy plus flocculence. 



Umbonate, having a buttonlike, raised center. 



Undulate, border wavy, with shallow sinuses. 



Vermiform contoured, growth like a mass of worms or intestinal coils. 



Verrucose, growth wartlike, with wartlike prominences. 



Villous, growth beset with hairlike extensions. 



Viscid, growth follows the needle when touched and withdrawn ; sediment, on 

 shaking, rises as a coherent swirl. 



Zooglceae, firm gelatinous masses of bacteria, one of the most typical examples 

 of which is the Streptococcus mesenterioides of sugar vats (Leuco'nostoc mesenteri- 

 oides), the bacterial chains being surrounded by an enormously thickened firm 

 covering, inside of which there may be one or many groups of the bacteria. 



TABLE 



A NUMERICAL SYSTEM OF RECORDING THE SALIENT CHARACTERS OF 



AN ORGANISM. (GROUP NUMBER)* 



100. Endospores produced 



200. Endospores not produced 



10. Aerobic (strict) 



20. Facultative anaerobic 



30. Anaerobic (strict) 



1. Gelatin liquefied 



2. Gelatin not liquefied 



0.1 Acid and gas from dextrose 



0.2 Acid without gas from dextrose 



0.3 No acid from dextrose 



0.4 No growth with dextrose 



.01 Acid and gas from lactose 



.02 Acid without gas from lactose 



.03 No acid from lactose 



.04 No growth with lactose 



.001 Acid and gas from saccharose 



.002 Acid without gas from saccharose 



.003 No acid from saccharose 



.004 No growth with saccharose 



.0001 Nitrates reduced with evolution of gas 



.0002 Nitrates not reduced 



.0003 Nitrates reduced without gas formation 



.00001 Fluorescent 



.00002 Violet chromogens 



.00003 Blue chromogens 



.00004 Green chromogens 



.00005 Yellow chromogens 



l This system will be found useful as a quick method of showing close relationships 

 inside the genus, but is not a sufficient characterization of any organism. 



