Ascobacteria : Ascococcus. 97 



face, so as to form cubical masses. Cells rather larger than 

 in F. rosea, colourless, round. 



123. P. glomerata, Van Tieghem {I.e., p. 150). 

 Colonies rounded, colourless, dividing in three direc- 

 tions, and remaining associated in lobed masses. 



All three forms were met with on putrefying seeds. 



ASCOBACTERIA, Van Tieghem {I.e., p. 151). 



This consists of colonies surrounded by a thick gelati- 

 nous membrane, and bears the same relation to Polybacteria 

 that Cohn's Ascococcus does to Punctula, 



124. A. ulvina, Van Tieghem {I.e., p. 151). 



Colonies polyhedral, enveloped in a thick cartilaginous 

 membrane, forming a coherent membrane like an Ulva, 

 composed of short rods aggregated without order, which 

 increase by bipartition. 



On the surface of liquids in which leguminous seeds, 

 especially of lupin, were decaying. 



ASCOCOCCUS, Cohn. 



125. A. vibrans, Van Tieghem {l.c., p. 151). 



Similar ' to A. Billrothii, but the cells oscillated and 

 whirled round, as in the Brownian movement. 



On the surface of water in which Beggiatoa was 

 growing. 



All these aggregated bacteria of Van Tieghem live on 

 the surface of fluids, and often, if not always, disengage 

 amirionia, like Ascococcus. 



H 



