962 



SCHIZOMYCETES 



Subgroup Non-Liquefactive. 



Definition. — Tetanus group, motile, not liquefying gelatine or inspissated 

 blood serum, and do not blacken meat media. 

 Remarks. — This group includes: — 



1. B. tertius Henry, 191 7, found in gas gangrene. {Synonyms : — 



B. Y. Fleming, 1915; B. von Hibler IX.; B. rodella III.) 



2. B. von Hibler VII. 



3. B. amylobacter Gruber, 1887. 



Classification. — These oiganisms may be recognized as follows: — 



A. Attack milk slowly, forming a soft clot after a long period : — 



I. Spores usually central — Von Hibler VII. 

 II. Spores typically terminal — B. tertius. 



B. Attack milk, forming tough clot, broken by gas — Amylobacter. 



FAMILY 3: SPIRILLACE^ Migula, 1900. 



Definition. — Eubacteriales with cells spirally curved or repre- 

 senting part of a spiral ; division in one direction. 

 Type Genus. — Spirillum Ehrenberg, 1838. 



Classification. — The family may be divided into the following 



genera: — 



A. Non-motile, comma-shaped, or spirally curved filaments, rigid, with- 



out flagella — Genus i, Spirosoma Migula, 1900. 



B. Motile, short, slightly curved, rigid, comma-like, sometimes in chains, 



with one, rarely more, flagella at one end, seldom at both ends — 

 Genus 2, Vibrio O. F. Miiller, 1773, emendavit Loeffler. 



C. Motile, long, spirally curved, usually with a bunch of polar flagella 



composed of long and short forms — Genus 3, Spirillum Ehrenberg, 

 1838, emendavit Loeffler. 



Remarks. — We are only concerned with the genus Vibrio, which 

 contains the cholera and paracholera organisms. 



If the spirochaetes were to be considered to be bacteria, they would be 

 classified here under the name Spironema. 



Genus Vibrio O. F. Miiller, 1773. 



Definition. — Spirillaceae motile, with short comma-like cells, 

 possessing one, rarely more, flagellum at one, rarely at both 

 ends. 



Type. — It is difficult to decide which is the type of this genus so 

 defined. 



Remarks. — The important species is the Vibrio comma Koch, 1884, 

 which is the cause of Asiatic cholera, but there are many other 

 which cause paracholera — e.g., V. gindha, Pfeiffer, 1896; F. kegal- 

 lensis Castellani, 1913; V. insolitus Castellani, 1913, etc. 



Classification. — The genus may be divided into aerobic groups 

 as follows: — 



