DESCRIPTION OF SPK< 1 1 -. 



.'.I! 



Bacterium photometricum(En- 

 gelmann). Rods slightly reddish in 

 colour : motile. 



The movements are stated to 

 depend on light. 



Bacterium synxanthum (Ehren- 

 berg : Bacterium .mntti'minn : Bnc- 



tiTtUiu <>f y< l/otr milk). Cocci '7 to 



1 p, in length, and rod-forms. 

 They produce a yellow colour in 

 boiled milk, which at first becomes 

 acid, and then strongly alkaline. 

 They also occur on boiled potatoes, 

 carrots, etc., where they form small 

 lemon-yellow masses. 



The colouring-matter is soluble 

 in water, insoluble in ether and 

 alcohol, unchanged by alkalies, de- 

 colorised by acids. It is similar 

 to yellow aniline colours, both 

 spectroscopically and in ordinary 

 reactions. 



Bacterium termo (Vignal). 

 Rods 1-5 to 2 p. in length, '5 to *7 /* 

 in width. 



Colonies white, surrounded by 

 liquefied gelatine. 



The bacilli inoculated in the 

 depth of gelatine produce a funnel- 

 shaped area of liquefaction ; later, 

 the jelly is completely liquefied and 

 coloured green. Cultures have a 

 strong putrefactive odour. 



In broth they form a white 

 deposit and colour the medium 

 green. 



They were isolated from human 

 saliva. 



Bacterium tholoeideum (Gess- 

 ner). Rods similar to Bacillus 

 lactis aerogenes. 



Pathogenic in small animals. 



They were isolated from healthy 

 human evacuations. 



Bacterium ureae (Cohn). Cocci 

 1'25 to 2 p. in diam., singly or in 

 chains, and rods. The rods split 

 up by division into chains of cocci, 

 which after a time are set free. The 

 cocci increase further by subdivi- 

 sion 1 , and a jelly-like membrane 

 develops around them. Masses of 

 cocci exist m the form of irregular 

 or roundish lumps. They are 

 aerobic. 



Cultivations, after twenty-four 

 hours, consist exclusively of rods ; 



after forty-eight hours, of cocci 

 chains ; and in fourteen days, of 

 zopgloea : the cocci transplanted 

 into fresh nourishing solution again 

 grow into rods. These observations 

 point to the existence of a \ 

 morphic specie 

 and the former nomenclati. ; 



M/v, must be regarded as 



untenable. 



In urine they set up ammoniacal 

 fermentation, converting urea 

 carbonate of ammonia. Rods. 

 long and 1 p. wide, have been iso- 

 lated from stale urine (Bacilli^ 

 urese, Leube), which also mo*t 

 energetically cause the ammon 

 fermentation of urine. 



Bacterium ureae (Jaksch). 

 Rods 2 pin length, 1 p. in width. 



Colonies on gelatine semi-trans- 

 parent. 



Inoculated in the depth of gela- 

 tine the i>;u-illi form a delicate 

 branching growth in the track o 

 the needle. 



They convert urea into carbonate 

 of ammonia, ami cultures smell of 

 herring brine. 



They occur in ammoniacal urine. 



Bacterium yiolaceum (Bt-rgon- 

 zini). Rods similar to Bacterium 

 termo, - G to 1 p. thick long. 



They occur on white of egg, 

 forming a violet pigment. 



Bacterium Zopfii (Kurth). 



Cocci, 1 to l'2f> p. in iliani. : rods 

 and threads. Cultivated in a streak 

 on nutrient gelatine spread out on 

 a glass slide, a peculiar develop- 

 ment takes place. In t\v 

 hours after inoculation threads 

 have developed; in forty eight 

 hours windings .>f tin- threads 

 are observed, and in six day- 

 threads ha vi- broken up into cocci. 

 They were observed in the ink 

 of fowls, especially in the contents 

 of the vermiform appcn 

 oculation of rabbits was followed 

 byn-_ lite. Identical with 



Bacillus ftf 



BeggiatoaalbaiViiui i 



1-o.ls, spiraN :inl tlir.-aoS i 

 Tin- ' 



laU.l 



less; their protoplasm contains 



