294 GENERAL SYSTEMATIC BACTERIOLOGY 



text fails to show, by this author, any use of the name, Diplostrepto- 

 coccus pleuropneumoniae. 



It is possible that it has been used previously to the article by Lingel- 

 sheim. It does not appear that this organism is sufficiently distinct 

 from other streptococci to warrant separate generic recognition. 



This name has also been used as a casual designation for the lactic 

 organism of the fermented milk. "Yoghurt," by Luerssen and Kiihn 

 (1908, p. 241). It was not used, however, as a generic name. 



This designation has also been used by Bettencourt and others for 

 streptococci showing diploid elements when taken from cerebrospinal 

 fluid (1904, p. 55). Perrone (1905, p. 371) mentions a Diplostrepto- 

 coccus intestinalis of Tavel. 



Diplovibrio. A name given by Maggi (1886, p. 176) to a growth 

 form of Vibrio. 



It has also been used by Billet (1890, p. 23). 



A casual name. 



Discomices. Apparently a typographical error for Discomyces 

 q.v. Migula (1900, p. 116). 



Discomyces. A generic name proposed by Rivolta (1878, p. 208) 

 to replace Actinomyces Harz, which he regarded as inept. Rivolta 

 and Micellone (1879, p. 145) used the name Discomyces equi to desig- 

 nate the organism causing socaUed "botiyomycosis" of the horse. 

 Later Rivolta (1884, p. 198) also described a species Discomyces pleuri- 

 ticus from the dog. This genus was at first regarded by Rivolta as 

 identical with Actinomyces Harz, but later both genera were recognized 

 as is evident from the following statement by Rivolta (1884, p. 188): 



Discomyces. II micelio di questo fungo e fatto da grandicellule otricellari 

 granulosa. 



Differisce dall actinomyces bovis Harz per la grandezza e disposizione degli 

 element! che lo constituiscono e per la struttura piu semplice. 



Esaminando questa specie, il Prof. Harz si convincera come non possa venir 

 confusa con I'actinomyces bovis perche ha nulla di raggiato. E fatto da grandi 

 cellule e non da filamenti. Le si conviene adunque il nome di discomyces equi. 



Si puo pertanto founare un gruppo di discomiceti patogeni compredente le 

 seguenti specie. 



I. L' actinoviyces bovis Harz. Sin. Corpuscoli o cespugli discoidi Rivolta, coUe 

 due varieta: Actinomice granuloso e Actinomice degli ascessi. 



II. II. Discomyces pleuriticus canis familiaris. 



III. II. Discomyces equi. Rivolta e Micellone. 



Discomyces Rivolta is listed as a synonjTxi of the genus Nocardia 

 Trevisan, by De Toni and Trevisan (1889, p. 927) although the two 



