934 



SCHIZOMYCETES 



Of all these, the most important from our present point of view is 

 EherthecB, which contains many intestinal organisms. 



TRIBE ENCAPSULATE.© Castellani and Chalmers, 191 8. 



Definition.- — -Bacillaceae growing well on ordinary laboratory 

 media, without endospores; neither fluorescent nor chromogenic 

 aerobes, not liquefying gelatine, possessing capsules in animal tissues. 



Type Genus. — -Encapsulatus Castellani and Chalmers, 1918. 



Genus Encapsulatus Castellani and Chalmers, 1918. 



Definition.- — -Encapsulatese with the tribal characters. 



Type Species. — -Encapsulatus pneumonice (Friedlaender, 1883). 



Remarks,- — -This genus is the only one at present in the tribe, and 

 it includes the old group of encapsulated bacilli which have been 

 reviewed by Fricke in 1896, Clairmont in 1902, Perkins in 1904, Abel 

 and Hallwacks in 1912, and Fitzgerald in 1914. 



The species are mostly short, non-motile. Gram-negative, en- 

 capsulated pleomorphic organisms, which ferment glucose and 

 lactose; but as regards the latter sugar, they may give rise to acid 

 only, though more usually they form acid and gas. 



Classification.— The various species of this genus may be recognized 

 as follows: — - 



A. Glucose completely fer^iented with the formation of acid and gas; 



lactose ferm.ented partially -with the formation of acid, but no gas. 

 Milk clotted — PneumonicB. 



B, Glucose and lactose completely fermented -with the formation of acid 



and gas. Milk clotted: — 

 I. Inosite not fermented — Acidi lactici. 

 II. Inosite fermented with the formation of acid and gas— LaciJis- 

 aerogenes. 



TRIBE EBERTHE^ Castellani and Chalmers 1918. 



Definition.— Bacillacese growing well on ordinary/ laboratory 

 media ; not forming endospores, aerobes, and often facultative anae- 

 robes; without fluorescence, pigment formation, or gelatine lique- 

 faction; without polar staining; Gram-negative, without a capsule. 



Type Genus.— Eberthus Castellani and Chalmers, 1918. 



Classification, — ^The tribe may be divided into genera, which ma.y 

 be recognized as follows :— 



A. Glucose and lactose either not at all or only partially fer- 

 mente.d with the production of acid, but no gas :— 



I. Milk not clotted ; — 



{a) Glucose and lactose not fermented — Genus i, Alcaligenes 



Castellani and Chalmers, 191 8. 

 {b) Glucose partially fermented with the production of acid 

 and no gas ; lactose not fermented: — 



1 . Motile — Genus 2, Eberthus Castellani and Chalmers, 1918. 



2. Non-motile — Genus 3, Shigella Castellani and Chalmers, 



1918. 



(c) Lactose and glucose partially fermented with the production 

 of acid, but no gas — Genus 4, Dysenter aides Castellani and 

 Chalmers, 191 8. 



