THE CLASSIFICATION OF BACTERIA 169 



2. Litmus milk blue or reaction unchanged. 



a. Nitrates reduced to nitrites. 



129. Bact.javaniensis (Dyar). 



b. Nitrates not reduced to nitrites. 



* Cultures on solid media rugose. 



130. Bad. palidor {Dyax). 



** Cultures on solid media not rugose. 



131. Bad. ovale (Wright). 



II. Pigment strongly developed, yellow, color decided. 



A. Gelatin colonies compound. 



132. Bad. luteum List. 



B. Gelatin colonies simple. 



1. Gelatin colonies dry, granular. Bacilli stain irregularly like diph- 



theria bacilli. 



133. Bad. striatum (v. Besser). 



2. Gelatin colonies not characterized as above. 



a. On agar a wrinkled layer. 



134. Bad. fuscum (Zimmerman). 



b. Agar cultures not characterized as above. 



135. Bad. constridmn (Zimmerman). 



136. Bad. solar e Lehmann-Neumann. 



137. Bad. breve (Frankland). 



124. Bact. spiniferum (Tommasoli) 



B. spiniferus Tommasoli : Monatsch. f. prakt. Dermatol., IX, 57. 



Morphology. Bacilli 0.8-1.0 : 2.0 ;«., bent, often parallel in bundles. 



Gelatin colonies. Old colonies with thorny outgrowths. 



Agar slant. Growth grayish yellow. 



Potato. Growth yellow. 



Habitat. Isolated from surface of human body. 



125. Bact. subochraceum (Dyar) 



B. subochraceus Dyar : I.e., 358. 



Morphology. Bacilli 0.7 : i.J /«. ; occur singly and in short chains. 



Gelatin colonies. Deep: round, dusky, yellowish. Surface: clear, irregular, 



slightly veined. 

 Litmus milk. Reddened. 



