510 



DESCRIPTION OF SPECIES. 



filaments. Motile, 

 tioa present. 



Spore-forma- I On potato the growth is brown. 

 I They occur in water. 



Fig. 202. — Photoghaph of Paut of an Impkbbbion Pbepabation of 

 Bacillus Figubans on Nutrient Gelatine, x 50. 



Colonies circular, with brown nu- 

 cleus and yellowish-green periphery. 

 In the depth of gelatine they 



Bacillus figurans (Crookshank). 

 — Rods, with rounded ends, varying 

 in length. Spore-formation present. 



Fig. 203.— Part of the same Sfkcimen shown in Fig. 202 / 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 



