248 GENERAL SYSTEMATIC BACTERIOLOGY 



Small rods, with rounded ends, non-spore-forming, motile or nonmotile,. 

 occurring in soil and having the property of digesting cellulose. 

 The type species is Cellulomonas hiazoteus (Kellerman). 



Cenomesia. A generic name proposed by De Toni and Trevisan 

 (1889, p. 1039) with the following diagnosis: 



Cocci globosi vel divisionis tempore globosovoidei, modice numerosi, in muco 

 matricali nidulantes, segregati, in familias globosas parvas singulas cystidibus 

 universalibus ampliusculis, crassiusculis homogeneis, non lamellosis, firmis, 

 gelatinosis involutas, consociati. Familiae e coccis ad peripheriam cumulatis 

 compositae, demum intus medio inanes. Cystides speciales nullae. Coccorum 

 divisio, initio generationum serierum, in duas directiones. 



Obs. Coelosphoerium Naegelii, Algarum Phycochromophycearum genus, 

 exacte analogum. 



The genus is included in the subfamily Coccogenae and the subtribe 

 Eu-Ascococceae. Two species are described, both named by Trevisan, 

 Cenomesia alhida and C. lilacina. Both contain sulphur granules and 

 the latter contains bacteriopurpurin. 



This name does not seem to have come into common use. The 

 writer has not been able to find any other author who has discussed 

 these species. It is possible that the descriptions are not sufficient 

 to make possible identification, and that the name Cenomesia is to be 

 regarded as a nomen nudum. More probably it is to be regarded as a 

 synonym of the genus Lamprocystis. It is rejected by Erwin F. Smith 

 (1905, p. 174). 



No type species has been designated, although Cenomesia alhida 

 Trevisan from its position may be regarded as such. 



Cephalotrichinae. The name given the first order of bacteria created 

 by Orla-Jensen (1909, p. 325). He includes in this order microor- 

 ganisms with spherical, rod-shaped or spiral cells. Endospores are 

 found only in a few sulphur-free spirilla. The cells may be motile 

 or non-motile; if the former either monotrichous or lophotrichous. 

 They are typically water bacteria. They secure their growth energy 

 almost exclusively by oxidative processes. Many of the members of 

 this group develop poorly in laboratory media because the organic 

 constituents are present in too concentrated a form. 



The order is divided into seven families as follows: Oxydobaderiaceae 

 (7 genera), Actinomycetes (4 genera), Thiohacteriaceae (4 genera), 

 Rhodobaderiaceae (12 genera), Trichobaderiaceae (7 genera), Lumini- 

 haderiaceae (5 genera), Reducibaderiaceae (2 genera). 



