422 GENERAL SYSTEMATIC BACTERIOLOGY 



Bernhard Fischer (1894, p. 19, et aZ.) notes the occurrence in the 

 Atlantic Ocean of the West Indian Light Bacillus {Photohacterium 

 indicum). He also described as new species Ph. delgadense, Ph. di- 

 generans, Pg. tuberosum, Ph. papillare, Ph. glutinosum, Ph. annulare, 

 Ph. coronatum. Ph. caraibicum. All are comma bacilli, showing consid- 

 erable variation in form. 



Migula (1897, p. 336) insists that this genus is to be regarded strictly 

 as physiologic, and invalid in nomenclature. All with the exception 

 of Beijerinck's Ph. phosphor encens he placed in Microspira. He 

 states that to bring all these forms together into a single genus is from 

 a systematic point of view quite incorrect, for they belong not only in 

 different genera, but in different families. He states further that 

 Beijerinck's Ph. phosphor escens is a true Micrococcus, the Ph. del- 

 gadense of Fischer a Pseudomonas and Ph. coronatum a Microspira. 

 Apparently he is mistaken with reference to Ph. phosphor escens, for 

 although Beijerinck gives as a synonym Micrococcus phosphorescens 

 Cohn, the pictures show the organism to be a rod. Possibly Migula's 

 suggestion that all these forms should be included in Microspira is 

 appropriate. The name is rejected as invalid. 



The type species is designated by Enlows (1920, p. 71) as Photo- 

 bacterium phosphorescens (Cohn) Beijerinck. 



If the phosphorescent bacteria of this group are regarded as deserv- 

 ing of generic recognition, Photobacterium may be regarded as a valid 

 designation, otherwise it may be regarded as a synonym (probably of 

 Vibrio.) 



Photobakterium. A spelling of Photobacterium used by Fliigge 

 (1896, p. 333) and other German writers. 



Photomonas. A name suggested by Orla- Jensen (1921, p. 271) 

 in the following statement: "As the phosphorescent bacteria form, 

 biologically, a connected whole, I deem it correct to unite them so as 

 to form one genus, for which a better name than Photomonas can 

 hardly be found." 



No species is named. Probably may be regarded as a synonym of 

 Photobacterium, and as invalid. 



Photospirillum. A generic name proposed by Miquel and Cambier 

 (1902, p. 888) for the species Photospirillum dunbari, described by 

 Dunbar (1893, p. 799) Enlows (1920, p. 71) states: "Photogenic. 

 Finest light is produced at 22° on gelatin prepared from peptonized 

 beef bouillon. Pathogenic for guinea-pigs." The type species is 

 therefore Photospirillum dunbari Miquel and Cambier. The genus may 

 probably be regarded as a synonym of Photobacterium. 



