GENERAL SYSTEMATIC BACTERIOLOGY 355 



Hansgirg (1888, p. 26G) noted the presence of this organism in wine 

 cellars, and gave Erehonema hercynicum Ktz. as a synonym. The 

 genus is also recognized by De Toni and Trevisan (1889, p. 1041) 

 with the description: 



Cocci globosi v. divisiones tempore globosoovoidei, pauci in muco matricali 

 nidulantes, segregati, in familias parvulas, singulas cystidibus universalibus, 

 amplis, crassis, plurilamellosis, gelatinosas, involutas, inordinate consociati. 

 Cystides in membranulam mucosam confluentes. Cystides speciales nuUae. 

 Coccorum divisio in tres directiones. Obs. Generis Thiothece clade affines, a 

 quo C3'stidibus e stratis pluribus latis efformatis in primis distinquitur. 



The only species given is Leucocystis cellaris with the variety caver- 

 narum Hansgirg. 



Migiila (1900. p. 195) reduced this generic name to a synonym of 

 Micrococcus, the species becoming Micrococcus cellaris. The genus 

 is rejected by Erwin F. Smith (1905). Apparently the name has not 

 been recognized by other authors. 



If the organisms described by Schroeter is worthy of generic rank, 

 probably Leucocystis is valid as its name. 



Leuconostoc. A generic name proposed by Van Tieghem (1878, 

 p. 198) for the organism studied by Cienkowski and regarded as re- 

 sponsible for the formation of gum in sugar factories. Cienkowski 

 (1878) named his organism Ascococcus mesenteroides. Van Tieghem 

 showed that this organism was distinct from Cohn's Ascococcus (q.v.). 

 The genus Leuconostoc was created with the following diagnosis : 



Cellulae achromaticae minimae globosae, in catenas laxas flexuoso-curvatas 

 implicata, vagina gelatinose cartilaginea lobata crassissima circumdatas, con- 

 sociatae. Vaginae in thallum gelatinose-cartilagineum, subglobosum vel cras- 

 sissimo membranaceum, irregulariter expansum, extus cerebroideum, intus 

 pseudoparenchymaticum aggregatae. Sporae singulae, globosae, majores, ter- 

 minales vel interstiales, pachydermaticae, intus homogeneae. 



Van Tieghem places Leuconostoc among the Nematogenae of Cohn's 

 classification, while Ascococcus was placed by Cohn in the Glaeogenae. 



The genus with its species Leuconostoc mesenteroides (Cienkowski) 

 Van Tieghem was recognized by Winter (1880) and by Grove (1884, 

 p. 16). 



It was included by Van Tieghem (1884) in the tribe Oscillariae of 

 the family Nostocaceae. De Bary (1884) describes the genus as 

 consisting of rosaries of cocci embedded in firm sheaths of mucilage, 

 and with arthrospores. Zopf (1885, p. 61) states: "Bildet Coccen 



