396 



MICRO-ORGANISMS IN WATER 



gelatine, and those micrococci which liquefy and do not liquefy 

 gelatine. A list of the bacilli and micrococci respectively 

 which have been found to be pathogenic to man or animals has 

 also been made. The names of such organisms will be found 

 printed in red letters in the text. We have gathered together 

 in sequence as far as possible those organisms which resemble 

 one another in respect of particular pigment produced, whilst 

 we have placed together with the spirillum choleras asiatica3 

 all the spirillar forms found in water, and with the bacillus 

 typhi abdominalis all the bacillar forms found in water which 

 resemble this organism. The figure on p. 395 represents some 

 of the more typical forms of micro-organisms as seen under the 

 microscope. 



Bacilli which LIQUEFY Gelatine 



Bacillus phosphorescens in- 



dicus . 

 ,, phosphorescens indi- 



genus . 

 argenteo-phos- 



phorescens lique- 



faciens . 



,, thalassophilus . 

 ,, granule sus 

 litoralis . 

 ,, limosus 

 halophilus 

 trernelloides 

 ,, Zopfii 

 Bacterium sulfureum 

 Bacillus radiatus aquatilis 

 plicatus . 

 nubilus . 

 ochraceus. 

 liodermos. 

 liquefacieiis 

 ,, liquidus . 

 ' Lemon-yellow bacillus ' 

 Bacillus mesentericus ruber . 

 mesentericus fuscus . 

 mesentericus vul- 



gatus . 



,, immctus . 

 stoloiiiferus 

 incanus . 

 iridescens. 

 ,, guttatus . 

 ., gen. 110 v. . 

 graveolens 



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