572 A PLEOMORPHIC SLIME BACTERIUM, 



body which yielded the osazone with the melting point 184° if» 

 related in some way to galactose. The gum formed by this 

 bacterium seems to lie midway between Macrozamia gum, the 

 product of Bac. macrozamice, and gum Acacia, the product of 



Bact. acacice. 



Bacillus alatus, n.sp. 



Shape, etc. — In or on ordinary media, it appears as a rod with 

 rounded ends, staining sometimes bipolarly. On maltose media, 

 it is generally furnished with lateral, globular capsules and 

 the stained portion is shorter than it is broad. It is motile, 

 the flagella being numerous and peritrichous. When stained 

 with fuchsin, the colour is fast to 5 % hydrochloric acid. The 

 Gram stain is negative. 



Relation to oxygen. — The growth under the mica plate was 

 feeble. 



Nutrient agar plate. — The colonies are translucent white and 

 amceboid, the raised projections become club-shaped, and the 

 growing points are raised and white, while the centre of the 

 colony is flat and transparent. Some of the colonies are rounded, 

 dirty-white, flat and waxy, with an uncharacteristic microscopical 

 appearance. The deep colonies are granular and dark brown. 



Glucose-gelatin plate. — The colonies are rounded, white, raised, 

 fatty and opalescent by transmitted light, showing faint lines 

 radiating outwards from the centre. Microscopically, the margin 

 is sharp and the structure is finely granular with annular cloud- 

 ings. The deep colonies are opaque. 



Nutrient agar stroke. — The growth is raised and translucent 

 white with smooth margin; it is of a thin gummy consistency. 

 The colour slowly becomes pale buff and the growth gravitates. 



Ghicose-gelatin stroke. — The growth is raised, narrow, trans- 

 lucent white and glistening. The base becomes furrowed as the 

 gelatin slowly liquefies. 



Saccharose-potato-agar* stroke. — The growth is raised, trans- 

 lucent white and slimy; it becomes luxuriant and of a pale buff 



* Saccharose 20, glycerin 10, potato extract 250, agar 20, water to 1000 c.c. 



