GENERAL SYSTEMATIC BACTERIOLOGY 287 



The genus was accepted by De Toni and Trevisan (1889, p. 1035) 

 and Ludwig (1892). Thaxter (1892, p. 394) concluded that this genus 

 is a synon3an of Chondromyces B. and C. (q.v.) and subsequent authors 

 have accepted his findings. The generic name is therefore to be re- 

 garded as invalid. 



Cystococcaceae. The first subfamily of the family Mycococcaceae 

 proposed by Hansgirg (1888, p. 266). He gave the following diagnosis 

 "Zellen oder Zellfamihen von bestimmt umgrenzten Gallerthiillen 

 (Cysten) umgeben." The following genera were included, Leuconos- 

 toc, Ascococcus, Mycothece, Leucocystis, Hyalococcus. 



Cytobacter. A casual name suggested by Duclaux (1895, p. 814) 

 to designate certain bacteria which destroy the cellulose wall of the 

 potato cell without attacking the starch, as distinguished from Amy- 

 lobader which destroys starch but not cellulose. 



Deazotonitraazobacterium. A name proposed by Ambroz (1913, 

 p. 10) for organisms which are capable of producing free nitrogen from 

 nitrates. One species is noted, Deazotonitraazobacterium thermophilum 

 Ambroz. 



It would seem that a name of this length (12 syllables) would rather 

 transcend good usage. 



Deazotonitranitriazobacterium. A name suggested by Ambroz 

 (1913, p. 10) to designate bacteria which set free atmospheric nitrogen 

 from nitrates and nitrites. See preceding. 



Deazotonitriazobacterium. A name suggested by Ambroz (1913, 

 p. 10) to include bacteria which can free elementary nitrogen from 

 nitrites. See preceding. 



Denitrobacillus. One of several names applied by Ambroz (1913, 

 p. 6) to Denitrobaderium thermophilum, Ambroz. Probably to be 

 regarded as a casual designation. 



Denitrobacterium. A genus of bacteria proposed by Orla-Jensen 

 (1909, p. 314) to include those organisms which show active denitrify- 

 ing powers, and have peritrichic flagella. He notes the type to be the 

 Bacillus denitrificans II of Burri and Stutzer, which has the power of 

 reducing nitrates to nitrites and of freeing elementaiy nitrogen. The 

 genus is regarded as an intermediate type between the two orders 

 Cephalotrichinae and Peritrichinae, and is placed tentatively as the 

 first genus in the family Addobacteriaceae of this latter order. 



Ambroz (1913, p. 3) named a Denitrobacterium thermophilum. 



Enlows (1920, p. 35) states: "Type species (monotypy). D. agile 

 {Bacillus denitrificans agilis Ampola and Garino 1896)." 



