96 GENERAL SYSTEMATIC BACTERIOLOGY 



B. Grows best anaerobically, but can often grow aerobically; diflBcult of culture, 

 and not producing arthrospores Genus 2. Cohnistreptothrix Pinoy, 1911 



Mrs. Enlows (1920) prepared a most helpful bulletin in which was 

 listed the various names which have been proposed by various writers 

 for bacterial genera. She has in most cases indicated the type species. 



Castellani and Chalmers (1920) proposed a classification of the family 

 Bacillaceae Fischer 1894 into some 10 tribes differentiated by the fol- 

 lowing key : 



Key to Tribes of Bacillaceae 



A. No development in ordinary media Nitrohactereae 



B. Growth poor in ordinary media, better on media containing blood. Gram- 



negative Hemophileae 



C. Very poor and slow growth on ordinary media, also on blood media. 



Graciloideae 



D. Good development on ordinary media. 



I. Endospores present Bacilleae 



II. Endospores absent. 



a. Fluorescent or chromogenic Bacteroideae 



b. Neither fluorescent nor chromogenic. 



1. Obligate anaerobes Bacteroideae 



2. Aerobic, often facultative anaerobic. 



(a) Liquefying gelatin Proteae 



(b) Not liquefying gelatin. 



(1) Without capsules. 



X. Bipolar staining. ' 



Pasteurelleae 

 2x. No bipolar staining. 



Ebertheae 



(2) With capsule Encapsulateae 



It will be noted that there is an evident misprint, as both tribes 

 5 and 6 are termed Bacteroideae. 



Three of the tribes are discussed in detail. The generic keys are 

 given below. 



Tribe Encapsulateae 

 The type and only genus is Encapsulatus Castellani and Chalmers. 



Tribe Ebertheae 

 A. Either do not ferment glucose and lactose at all, or only partially, with pro- 

 duction of acid without gas . 

 I. Milk not coagulated. 



a. Ferments neither glucose nor lactose. 



Alcaligenes. Castellani and Chalmers, 1918 



