96 Synopsis of tlie Bacteria and Yeast Ftmgi. 



POLYBACTERIA, Van Tieghem (Bull Soc. Bot. 

 France, 1880, p. 149). 



Under this and the following genera, Van Tieghem 

 places some bacteria which are probably only zooglcea 

 stages of other species, like Ascococcus, which they 

 resemble. 



119. P. catenata, Van Tieghem (I.e., p. 150). 

 Colonies naked, oval, colourless, composed of short 



rods aggregated without order; the colonies divide trans- 

 versely in such a manner as to remain attached end to end 

 in a flexuous chain. 



In a decoction of horse-dung. 



120. P. sulfurea, Van Tieghem (I.e., p. 150). 

 Colonies rounded or polyhedral, composed of short 



rods of a sulphur colour ; the colonies divide in two direc- 

 tions at right angles to one another, so as to form a simple 

 layer. 



On the surface of a liquid in which haricot-beans were 

 decaying. 



PUNCTULA, Van Tieghem (I.e., p. 150). 

 Differing from Polybacteria, in the cells of which it is 

 composed being round. 



121. P. rosea, Van Tieghem (I.e., p. 150). 



Colonies single, of a bright rose colour, spherical ; cells 

 round, extremely small, arranged in radiating lines and 

 concentric circles. 



122. P. cubica, Van Tieghem (I.e., p. 150). 

 Colonies cubical, dividing successively parallel to each 



