240 GENERAL SYSTEMATIC BACTERIOLOGY 



strains which do not form slime, and consequently also no mesentery. It is pos- 

 sible that the betacocci should be divided into more than the two mentioned spe- 

 cies. With all experiments in this direction, however, I have felt that I was work- 

 ing on treacherous ground, as these bacteria exhibit such great variability in 

 almost all respects. 



Winslow (1920, p. 102) regards this as synonymous with Leuconostoc 

 Von Tieghem. 



Billetia. A genus of bacteria founded by Trevisan (1889, p. 11) 

 upon the species Bacterium Laminariae of Billet (1888, p. 293). The 

 genus was reduced to synonomy with Kurthia by De Toni and Trevi- 

 san (1889, p. 931). The genus name has apparently never come into 

 use. It should probably be considered a ^^ genus incertae sedis" until 

 the original species can again be identified and its right to generic rank 

 decided. The generic description reads '' Kurthia sporifera con vagine 

 distinte." It is included as the sixth genus of his tribe Leptotrichiee. 



BoUingera. A genus proposed by Trevisan (1889, p. 26) but 

 without description. One species, BoUingera equi is included. The 

 diagnosis given by De Toni and Trevisan is as follows (1889, p. 1034): 



Discomyces Rivolta (1884), Botryomyces Bollinger (1886) nomen tantum et ut 

 Discomyces valde ineptum; Botryococcus Kitt (1886) nee Kuetz. (1849). Cocci 

 globosi V. divisionis tempore globoso ovoideis, cystidibus specialibus destituti, 

 numerosissimus, in muco matricali nidulantes, segregati, in familias globosas 

 magnas, singulas cystidibus universalibus amplis crassis lamellosis summe firmis 

 cartilagineis involutas, inordinate consociati. Glebae globosae ovoideae vel 

 piriformes, omni aetate intus solidae, in acervos permagnos solidissimos. Rubor- 

 um fructus externam faciem quodianmodo simulantes, densissime cumulatae. 

 Coccorum divisio in tres directiones. 



Two species are given, BoUingera equi Trevisan (synonyms Zoog- 

 loea pulmonis equi Bolhnger 1870, Discomyces equi Rivolta 1884, 

 Micrococcus ascoformans Johne 1885, and Micrococcus hotryogenes 

 Rabe (1886)) and B. Vacchetae Trevisan {Discomyces pleuriticus canis 

 famiUaris, Rivolta 1884) . The type is BoUingera equi Trev. 



The genus has never come into common use, and may probably be 

 suppressed as a synonjon. It is rejected by Erwin F. Smith (1905). 



Borrelia. A generic name proposed by Swellengrebel (1907, p. 

 582) to include those forms of the family Spirochaetaceae in which the 

 cells are provided with peritrichous flagella. The type species is 

 given as Borrelia (Spirochaeta) gallinarum. If this organism should 

 stand as a generic type, the name would appear to be valid but 

 possibly it should be reduced to a synonym of Spiroschauditmia, 



