510 



DESCRIPTION OF SPECIES. 



filaments. Motile. Spore-forma- I On potato the growth is brown, 

 tion present. I They occur in water. 



Fia. 202.— PHOTOGK.iPH OF Part of an Imi>kession Peepakation op 

 Bacillus Figueans on Nutkient Gelatine, x 50. 



Colonies circular, with brown nu- 

 cleus and yellowish-green periphery. 

 In the depth of gelatine they 



Bacillus figurans (Orookshank). 

 — Rods, with rounded ends, varying 

 in length . Spore-formation present. 



/ 





Fig. 203.— Paet of the same Specimen shown in Fig. 202 x 200. 



grow in the track of the needle 

 and on the free surface, colouring 

 the jelly green by transmitted light, 

 yellow by reflected light. 



In plate-cultivations they cause 

 a cloudy growth, spreading from 

 various points ; if a cover-glass 

 impression is made, this is found 



