396 GENERAL SYSTEMATIC BACTERIOLOGY 



Bergey et al. (1923, p. 41) includes this as the first tribe of the family 

 Coccaceae. 



It should be noted that the spelling should be Neisserieae. 



Neisseria. A generic name proposed by Trevisan (1885, p. 105) 

 with the gonococcus of Neisser as the type The generic description 

 is as follows: "Colonie di 4 cocchi subovoidei, consociati a due in im 

 unico strato ad avoiluppati da densa mucosa, ialina, spianeta a guisa 

 di membranella quadrata, da ultimo hbero." The single species 

 listed is Neisseria gonorrhoeae. Trevisan (1889, p. 32) includes this as 

 the first genus of his tribe Micrococcee. Fourteen species are included, 

 the first being N. gonorrhoeae. De Toni and Trevisan (1889, p. 1067) 

 give the following diagnosis: 



Cocci primitus globosi indivisi, aetate provecta in coccos duos biscoctiformiter 

 geminos latere fratrem versus plus minus complanato, utrinque ad polos isthmis 

 filamentosis tenuissimis insimul nexos, scissi, nunquam in turmas racemiformiter 

 consociati. Endosporae microsomae, in coccis normalibus obvenientes. 



Twenty-four species are included in the genus. The name Neisseria 

 has rarely been used, usually being displaced by the term Diplococcus. 

 Neisseria, however, has priority over this name if the gonococcus is 

 the organism which should be taken as the type of the genus, or is 

 to be included within it. It is rejected by Erwin F. Smith (1905). 

 For discussion see Diplococcus. Vuillemin (1913, p. 525) has proposed 

 that Neisseria with the type species N. gonorrhoeae be made a Genus 

 conservandum-. 



Buchanan (1917, p. 612) recognized the genus with the following 

 description: 



Parasites, growing poorly in most laboratory media. Cells usually in pairs, 

 flattened, coffee-bean shaped. Gram-negative. As a rule showing considerable 

 fermentative power in carbohydrate media. 



The type species is Neisseria gonorrhoeae Trevisan. 



It was included as the fourth genus of the tribe Streptococceae. 

 Winslow et al. (Committee Soc. Am. Bact., 1917, p. 557) used the 

 following diagnosis. 



Strict parasites, failing to grow or growing very poorly on artificial media. 

 Cells normally in pairs of flattened cells. Gram-negative. Fermentative powers 

 low. Growth fairly abundant on serum media, usually whitish or yellowish. 



The type species is Neisseria gonorrhoeae Trevisan. 



The committee (1920, p. 205) made it the sole genus of the tribe 

 Neissereae. 



