[HARRISON & KENNEDY] DISCOLOURATION OF CODFISH 125 



Following the classification suggested by the Committee of the 

 Society of American Bacteriologists, the organism is excluded from 

 the genus Pseiidomonas for the same reasons as are given above ; and 

 the genus Serratia is not accepted by the Society (33). 



This organism is in many particulars a simple type, having its 

 habitat in all probability in sea water, and being able to grow in salt 

 solutions with the addition of seaweed. It has adapted itself to 

 growing on fish, but cannot use nitrogen in the simpler combinations. 

 In many respects it is unique, consequently the difficulty of classifica- 

 tion. 



The names Rhodo-bacter and Rhodo-bacillus have been used 

 already for classifying some of the thio bacteria, and hence cannot 

 be used. 



If this organism warrants a new genus it might be called Erythro- 

 bacter, but for the present it had better be placed in the genus Pseudo- 

 monas. 



As for the specific name Browne has suggested the name halo- 

 philicum in an unpublished MS. which he kindly placed at our dis- 

 posal. The summary of his investigation published in the Journal of 

 Bacteriology gives no name; however, his organism is probably 

 similar to ours, but is more thermophilic. Russell (34) has described 

 a bacillus from sea-water under the name halophilus. As the habitat 

 of this organism has been traced to tropical salt works the name we 

 suggest is Salinaria, belonging to or pertaining to salt works. Some 

 of these works obtaining salt from sea-water were established by the 

 Romans at Ostia and traces of them remain to this day. 



The organism, although found on fish prepared in northern 

 climates, has its origin in salts coming from tropical salt works, and 

 hence we prefer as the specific name salinaria rather than halophilicum, 

 a more general designation and common to many sea-water organisms. 



We suggest, therefore, that this red organism be called Pseudo- 

 monas salinaria. 



5. Cultural Characteristics. 



On beef peptone agar, gelatine, potato, broth, milk, sugar broths, 

 or in fact, on any of the ordinary media, this organism does not grow. 

 Repeated attempts have been made at various temperatures to 

 obtain growth but without results. 



Modifications of Culture Media. Media were made with the 

 addition of various percentages of salt. Unless otherwise stated, sea 

 salt was used and definite weights were added to the media. The 

 base of most media was codfish, either obtained fresh, or, when not 



