GENERAL SYSTEMATIC BACTERIOLOGY 415 



negative rods, showing bipolar staining. Parasitic forms of slight 

 fermentative power." 



The only genus included is Pasteurella. 



Pasteuria. A generic name proposed by Metschnikoff (1888, p. 

 166) for Pasteuria ramosa, an organism described from the bodies of 

 the water fleas Daphnia pulex and D. magna. The generic diagnosis 

 given by De Toni and Trevisan (1889, p. 941) follows: 



Baculi primitus in cumulos rotundatos, axi central! ramoso instructos, arctis- 

 sime acervati, confluentes, dein ob pluries repetitam divisionem longitudinalem 

 segregati, demum soluti, ellipsodei, stipitulati. Sporae (Endosporae) globosae, 

 microsome, ad apicem baculorum liberorum obvenientes. 



Obs. A caeteris Baculogenis ob forman valde peculiarem cumulorum primi- 

 geniorum at baculorum divisionem semper longitudinalem praedistincta. 



The organism apparently has not been observed by other investi- 

 gators. Lehmann and Neumann (1896, p. 20) say that the organism 

 can scarcely be regarded as belonging to the bacteria in a strict sense. 



Migula (1904, p. 128) doubts the bacterial nature of this organism 

 and excludes it from his classification. The name is included by 

 Erwin F. Smith (1905, p. 162) among the rejected genera. 



Vuillemin (1913, p. 527) states that this organism may be differ- 

 entiated from Nocardia ( !) by its claviform ramifications, by its dichot- 

 omy and by the formation of spores inside the cells. He proposes 

 it as a genus conservandum of the Microsiphonees with the type species 

 P. ramosa Metchnikoff. 



The nomenclatural status and position of this genus is uncertain. 

 The type species is Pasteuria ramosa Metchnikoff. 



Pasteuriaceae. A family name proposed by Metschnikoff (1888, 

 p. 165) to include his genus Pasteuria and the bacteria of the root 

 nodules of leguminous plants. 



Pasteurieae. A subtribe of the tribe Bacilleae named by De Toni 

 and Trevisan (1889, p. 941) with the following diagnosis: "Baculorum 

 divisio semper in unam eandemque directionem longitudinalem repe- 

 tita. Endosporae." The single genus Pasteuria is included. 



Pectinobacter. A generic name proposed by Makrinov (1916, p. 

 440) for the species (type) Pectinobacter amylophilum. Enlows (1920, 

 p. 69) summarized the description of the species as follows: 



Rods 4 to 6m long by 0.5 to 1m wide. Motile. Spores are formed, prior to 

 which a fusiform aspect is assumed. Gram positive. Grows better on starch 

 media than on any other. Active fermentative agent. Isolated from soil. 



