BACTERIUM CREMOIDES. 267 



Bacillus devorans Zimmermann (i, p. 48). 



Found in well-water. It possesses very active locomotion, but 

 nothing is known of its pathogenic properties. 



Bacterium turcosum. (Zimm. ii, p. 32.) Lehm. 

 and Neum. 



Very small rods, 0.2-0.3 // thick and 0.3-1.5 p long, with slug- 

 gish movement, which is due to a polar flagellum. 



Upon gelatin plates: small, intense turquoise-yellow, transparent 

 colonies, which gradually sink into the gelatin ; microscopically, struc- 

 tureless and more or less transparent. The growth in the gelatin 

 stab culture develops slowly, is smooth, roundish, of an intense yellow 

 passing into a greenish color, and sinks in very slowly, without lique- 

 faction. The agar cultures are similar. Upon potato: scanty, green- 

 ish-yellow dry or slightly shining growth. In bouillon there is a little 

 turbidity, without formation of H 2 S or indol worth mentioning. 

 Grape-sugar is not perceptibly affected. Milk is not coagulated. 



Isolated by Zimmermann from water. In examinations of prepu- 

 tial secretion we have twice obtained cultures which correspond to 

 Zimmermann 's original one. 



Bacterium cremoides nobis ad interim. 1 



Short rods, 0.5-0.8 fj- thick, 0.8-1.6 ^ long, non-motile, staining by 

 Gram's method. Gelatin plate : natural size, gray to grayish -yellow 

 disks; magnified 60 times they are finely granular, later opaque and non- 

 liquefying. The gelatin stab is not characteristic ; the surface growth 

 gradually becomes thick, whitish, reddish, or cream colored and has 

 an oily luster. In the agar stab the growth has a moist luster and is 

 cream colored. The water of condensation is clear with a pellicle and 

 little sediment. Bouillon is similar. Little indol and H 2 S are 

 formed, and no gas from sugar. Milk is not coagulated. 



Obtained from the tap- water of Wiirzburg. 



1 Bacterium synxanthum (Ehrenberg) L. and N. Ordinary name : 

 Bacillus of yellow milk. According to J. Schroter, it is characterized 

 as follows : Actively motile, short, thin rods, producing a yellow 

 pigment, which is readily soluble in water, but not at all in ether and 

 alcohol. It is decolorized by acids, but the yellow color returns upon 

 treating with alkalis. Milk is colored a bright yellow, the casein is 

 dissolved, and the milk becomes alkaline. The culture which we 

 obtained from Krai possessed no motility, clouded the bouillon, and 

 produced a prominent pellicle; coagulated milk, with formation of 

 acid; formed gas from grape-sugar; furnished very luxuriant, moist, 

 yellowish-gray growths, resembling those of the B. coli upon agar and 

 gelatin, without liquefaction, and upon potato developed as a light 

 yello\Y, much elevated growth with a fatty luster. Stains by Gram's 

 method. 



