GENERAL SYSTEMATIC BACTERIOLOGY 461 



the possible exception of a single genus). Many forms produce pigments of other 

 types. The cells may be motile by means of flagella; some of the forms inter- 

 grading with the protozoa are flexous, a few filamentous forms (as Beggiatoa) 

 show an ocillating movement similar to that of certain of the blue green algae 

 (as Oscillatoria). 



He recognized six orders, the Eubacteriales, Chlamydobacteriales, 

 Thiobacteriales, Actinomycetales, Myxdbaderiales , and Sj)irochaetales. 



Winslow et al. (Committee Soc. Am. Bact., 1917, p. 549) used the 

 following description: 



Minute, one-celled, chlorophyll-free, colorless, rarely violet-red or green - 

 colored plants, which typically multiply by dividing in one, two or three direc- 

 tions of space, the cells thus formed sometimes remaining united into filamen- 

 tous, flat, or cubical aggregates. Capsule or sheath composed in the main of pro- 

 tein matter. The cell plasma generally homogeneous without a nucleus. Sexual 

 reproduction absent. In many species resting bodies are produced, either endo- 

 spores or gonidia. Cells may be motile by means of flagella. 



The same definition is used by Bergey et al. (1923, p. 29). 

 Schmidlea. A generic name proposed by Lauterborn (1913, p. 98) 

 for one of the family Chlorobakteriaceae. His diagnosis is: 



Schmidlea nov. gen. mit Sch. luteola (Aphanothece luteola Schmidle). Zellen 

 elliptisch, 0,0015-0,002 mm. lang, zu wolkenartigen, rundlichen bis ovalen, oft 

 gelappten gallertigen Kolonien vereint, die bisweilen vakuolenartige Raume 

 umschliessen. Die Kolonien umfassen oft Tausende von Zellen und erreichen 

 nicht selten mehr als 0,2 bis 0,3 mm. Durchmesser. 



The organism is found in decomposing plant remains in lake bottoms, 

 particularly in decomposing Char a. 



The position of this genus among the bacteria is questionable. 



Schuetzia. A genus proposed by Trevisan (1889, p. 29) as the second 

 genus of his tribe Streptococcee. The description is "Cocchi globulosi o 

 per incipiente temnogenesi brevemente ellissoidi (monococchi), seriati 

 in filamenti moniliformi, semplici, racchiusi in tenui capsule membra- 

 naceo-gelatinose. Spore macrosomeprovenientinei filamenti." Three 

 species are included, Sch. Poelsii, the organism of equine distemper, Sch. 

 Laughlini and Sch. Dissei. The diagnosis given by De Toni and Trevi- 

 san (1889, p. 1052) follows: 



Cocci globosi vel divisinis tempore ovoidei, in filamenta moniliformiter con- 

 catenati, capsulis membranaceo-gelatinosis, arctic, tenuiusculus, homogeneis, 

 non lamellosis obducta. Arthrosporae macrosomae, in filamentis obvenientes. 



