512 



DESCRIPTION OF SPECIES. 



In the depth of gelatine a white 

 filament forms in the track of the 

 needle, with liquefaction in the 

 upper part, and an iridescent sheen 

 is produced in the jelly. 



On potato they develop a brown- 

 ish layer. 



They occur in water and in 

 putrid infusions. 



Bacillus fluorescens lique- 

 faciens minutissimus (Unna and 

 Tommasoli). Rods 1 '5 to 2 /u. in 

 length, -3 p. in width. 



Colonies circular, with brownish 

 nucleus and yellowish marginal 

 zone. 



In the depth of gelatine lique- 

 faction forms in the track of the 

 needle. The liquid is turbid and 

 yellowish, and a white sediment 

 forms at the bottom and a fluores- 

 cent scum on the surface. 



On agar and potato the growth is 

 brownish. 



They were isolated from eczema- 

 tous skin. 



Bacillus fluorescens longus 

 {Zimmermann). Rods varying in 

 length, some curved, 1'45 to 1'65 p 

 in length, '83 p, in width, and wavy 

 filaments 14 p in length. Motile. 



Colonies circular, well-defined, 

 yellowish, with broad twisted 

 markings. 



On the surface of gelatine they 

 produce a layer with a bluish-green 

 fluorescent colour. 



On agar a thin film forms, and 

 the jelly is coloured greenish- 

 yellow. 



On potato the growth is slimy 

 and yellowish. 



They occur in water. 



Bacillus fluorescens nivalis 

 (Schmolck). Rods and chains. 

 Motile. 



Colonies circular, surrounded by 

 liquid fluorescent jelly. 



Inoculated in the depth of gela- 

 tine they produce liquefaction in 

 the track of the needle, and the 

 jelly is coloured green. 



On agar the growth is white and 

 the jelly green. 



On potato the growth is brownish. 



They are probably identical with 

 Bacillus fluorescens liquefaciens. 



They were isolated from snow. 



Bacillus fluorescens non-lique- 

 faciens (Eisenberg). Short deli- 

 cate rods. Non-motile. 



Colonies have the appearance 

 of fern-leaves, and are opales- 

 cent. 



Inoculated in the depth of gela- 

 tine the growth is very slight in 

 the track of the needle, and on the 

 surface filmy and fluorescent. 



On agar they form a greenish 

 layer. 



They produce a brownish layer 

 on potato, and bluish-grey dis- 

 coloration. 



They occur in water. 



Bacillus fluorescens putidus 

 (Fltigge). Short rods with rounded 

 ends. Motile ; spore-formation not 

 known. 



They form small dark colonies 

 with a greenish sheen, which have 

 a penetrating odour. 



Inoculated in the depth of gela- 

 tine they produce a pale-grey 

 growth, and after three days colour 

 the medium with a greenish tinge 

 spreading down from above. 



On potato they rapidly develop 

 a brownish layer. 



They occur on decomposing sub- 

 stances, producing a greenish 

 coloration. 



According to Lehmann and Neu- 

 mann the Bacillus fluorescens albus 

 and Bacillus fluorescens longus of 

 Zimmermann and Bacillus fluores- 

 cens non-liquefaciens are merely 

 varieties of Bacillus fluorescens 

 putidus ; and further, cultures of 

 this bacillus on agar and on potato 

 and in milk and in broth cannot 

 be distinguished from those of 

 Bacillus fluorescens liquefaciens. 



Bacillus fluorescens tenuis 

 (Zimmermann). Rods 1 to 1'85 fj. 

 in length, '8 p. in width. Singly, 

 in masses, and filaments. Motile. 



Colonies irregular. 



Inoculated in the depth of gela- 

 tine a delicate filament forms in 

 the track of the needle, and on 

 the surface a greyish-white growth 

 spreads and colours the gelatine 

 yellow. 



On agar the growth is shining 



