GENERAL SYSTEMATIC BACTERIOLOGY 277 



Zellen rundlich, in einfacher peripherischer Schicht von gemeinsamer Gallerte 

 umschlossen, hohle kuglige oder spiiter unregelmassiger geformte Blasen oder 

 Siicke bildend, die schliesslich netzformig durchbrochen sind. Vermehrung der 

 Zellen durch wiederholte Zweitheilung der Familien durch Furchung und Abglie- 

 derung von Tochterfamilien. Die Cohn'sche Gattung Clathrocystis umfasst 

 nach meiner Auffassung Algen und Pilze. Da nun der Gattungsname zuerst 

 fiir eine Alge {CI. aeruginosa Henfry) angewendet wurde, so ist es rathsam, ihn 

 dieser zu lassen, und die zu den Pilzen gehorige Art zur Reprasentantin eines 

 neuen Genus zu machen, dem ich, zu Ehren des um die Erforschung der Schizo- 

 myceten so hoch verdienten Professor Dr. F. Cohn in Breslau den Namen Cohnia 

 gegeben habe. 



This genus is also recognized b}^ Grove (1884, p. 17). The name 

 is rejected by Erwin F. Smith (1905, p. 174) and as used for bacteria 

 is generally regarded as a S3^nonj'Tn of Lamprocystis. 



The type species is Cohnia roseo-persicina (Cohn) Winter. 



Cohnistreptothrix. A genus of thread bacteria proposed by Pinoy 

 (1913, p. 929) to include those forms which differ from Nocardia by 

 anaerobic or microaerophilic growth and by absence of conidia (gonidia). 



The genus is accepted by Castellani and Chahners (1919, p. 251 and 

 p. 1063). They give the following statement (p. 1063): 



Definition. Nocardiaceae growing best anaerobically, but can grow aerobi- 

 cally; usually difficult to cultivate and do not produce arthrospores. 



Tj^pe Species. Cohnistreptothrix israeli (Kruse, 1896) 



Historical. In 1891, Wolff and Israel published a beautifully illustrated 

 account of a streptothrix, which they had isolated from two cases of actinomyco- 

 sis in man— viz., from the lungs and from a retromaxillary growth. This organ- 

 ism was considered to differ from N. bovis, in that it grew best anaerobically, 

 that branching was absent, and that its injections into animals were regularly 

 positive in their result. These three characteristics induced Kruse, in 1896, 

 to make a new species for it under the name Streptothrix israeli. In 1911, for 

 reasons already set forth, Pinoy founded a new genus. Cohnistreptothrix, with 

 Israel's organism as the type species, and therefore its name becomes Cohni- 

 streptothrix israeli (Kruse, 1896). 



These authors list a considerable number of species. 



Coleothrix. Veley and Veley (1898, p. 154) according to an abstract 

 (Kochs Jahresber., 9, 154, 1898) named a branched filamentous or- 

 ganism, sometimes appearing as cocci, Coleothrix methystes. It is one 

 of the important causes of faulty rum in the West Indies. 



Colibacterium. A generic name proposed by Orla-Jensen (1921, p. 

 272) in the following statement: 



The genus Bacterium will undoubtedly dissolve into several genera, of which 

 I may especially mention the Colibacterium, and Aerogenesbacterium. The 



