280 GENERAL SYSTEMATIC BACTERIOLOGY 



CoFTnemonas. A genus of bacteria proposed by Orla-Jensen (1909, p. 

 344) to replace Corynehacterium Lehmann and Neumann (q.v.). It 

 has as its type species Corynemonas diphtheriae and is placed in the 

 family Actinomycetes as its second genus. It is to be regarded as an in- 

 valid synonym of Corynehacterium. 



Corynethrix. A generic name used by Bongert (1901, p. 449) in 

 the title of a paper, but not used by him in the article. It is possible 

 that the name has been used previously, but no earlier reference has 

 been found. 



The organism Corynethrix 'pseudotuberculosis murium is described 

 as a non-motile rod in young cultures on agar 0.5, 1 to 2n. Older 

 cultures show great numbers of involution forms. On potatoes the 

 ceUs may become 15/^ in length, and cultures three to four weeks old 

 are almost Actinomyces-\\ke. The older rods stain irregular, and 

 showing pronounced metachromatic granules. In young cultures the 

 ceUs are said to be gram negative, but when the granules appear 

 they become gram positive. Neisser's stain shows the metachromatic 

 granules distinctly. The organism is grouped quite definitely with 

 the diphtheroid forms. 



The generic name occurs in a trinomial, and should probably be 

 regarded as invalid, or at most as a synonym of Corynehacterium. 



Corynocladus. A genus of filamentous bacteria proposed by Leidy 

 (1849, p. 250). The generic description and the description of the 

 single species Corynocladus radiatus are as follows: 



Filaments hyaline, inarticulate, very compound; branches thicker than the 

 trunk, clavate, without ramuli, growing from rounded or oval granular masses. 



Corynocladus radiatus. Comatose, growing in very dense bunches, occa- 

 sionally straggling; branches spreading, terminal ones very long, simple, clavate, 

 jU inch long. 



Length y^ inch diameter of trunk t^.outf inch branches ^Jo inch. 



Habitat. Growing profusely in the ventriculus of Passalus cornutus, from the 

 mucous membrane. 



This organism was again described and figured by Leidy (1851, p. 

 38). 



Apparently the genus has not been recognized since the original 

 description. It may be included among the genera incertae sedis. 



Crenothrichaceae. The second family of the order Desmohacteria 

 recognized by Hansgirg (1888, p. 229). He says: 



Diese bisher mit dea Leptothricheen vereinigte Spaltpilzgruppe muss aus 

 denselben Grtinden wie die ihr unter den blaugriinen Algen (Schizophyceen) 



