258 GENERAL SYSTEMATIC BACTERIOLOGY 



Buchanan (1918, p. 52) emended the description of the genus as 

 follows : 



Rod-shaped bacteria, without spores, aerobic, producing a violet chromopar- 

 ous pigment soluble in alcohol but not in chloroform, motile or non-motile, Gram 

 stain variable. 



The type species is C hromobacterium violaceum Bergonzini. 



The genus was recognized by Winslow et at. (Committee Soc. Am. 

 Bact., 1920, p. 209) with the following description: 



Aerobic bacteria, producing a violet chromoparous pigment, soluble in alcohol 

 but not in chloroform. Motility and Gram reaction variable. 

 Type species, Chr. violaceum Bergonzini. 



Bergey et at. (1923, p. 117) include this as the third genus of the 

 tribe Chromobactereae. 



If the violet bacteria should have generic recognition the name is 

 apparently valid. 



Chromobeggiatoa. The second section (subgenus) of the genus 

 Beggiatoa recognized by Hansgirg (1888, p. 264) with the following 

 descriptions: "Faden von rosen-bis-pfirsch rother Farbe, rosen-oder 

 blutrothe, violette bis violettbraunliche Ueberziige an im Wasser faulen- 

 den Substanzen bildend, oder das Wasser roth farbend." The only 

 species listed is Beggiatoa roseo-persicina Zopf. 



Chromococcus. A revision of the spelling of Cromococcus Bergon- 

 zini q.v. used in an anonymous review in Journ. Roy. Mic. Soc, (1881, 

 p. 284). 



This form is also used by De Toni and Trevisan (1889, p, 1067) in 

 the synonymy of Streptococcus violaceus. The type species (monotypy) 

 is Chromococcus violaceus Bergonzini. 



Cladochytrium. A genus of fungi named by Nowakowski (1876). 



The name Cladochytrium tuberculorum was proposed by Vuillemin 

 (1888, p. 121) for the fungus which he believed was the primary cause 

 of nodule formation on the roots of leguminous plants. The bacteroids 

 were concluded to be simple differentiations of the plasma. The in- 

 fection threads he beheved to be fungal in nature. See Rhizobium. 



Cladoph3rtum. A generic name used by Leidy (1849, p. 227) for 

 two species of entophytes from the intestine of Julus (thousand leg). 



The original description of the genus, and the first species follows : 



Filaments minute, attached by means of a roundish nucleus, simple or com- 

 pounded near the base of attachment, with minute lateral ramuli, inarticulate, 

 and with no evidence of interior structure. 



