PLANTS OF IOWA 21 



196. B. sporogenes, (Klein). 



Widely distributed, sewage, water, horse and cow ma- 

 nure, street dust. 

 Pseudomonas, Migula. 



197. P. campestris, (Parnmel) Smith. 



Causing rot of cabbages and other crucifers. 



198. P. pyocyanea, (Gessard), Migula. 

 In pus, gangrene, etc. 



199. P. fluorescens, (Flugge) Migula. 

 In water. 



SPIRILLACE^ FAMILY. 



Spirillum, Ehrenberg. 



200. S. sputigenum, (Miller). 



Isolated from tartar on teeth and from saliva. 

 Spirocileta, Ehrenberg. 



201. 8. pallida, (Schaudinn). 

 Isolated from lesions of syphilis. 



mycobacteriace-e; family. 

 Mycobacterium, Lehmann-Neumann. 



202. M. leprm, (Hansen) Lehmann-Neumann. 



Found in large numbers in leprous lesions, in the round 

 cells of granulation tissue of tuberculous nodules, in 

 lymphatic spaces, in endothelial cells, and in the walls 

 of blood vessels. 



203. M. malei, (Loeffler) Migula. 



Secretions and ulcers and tubercles in glanders in men, 

 horses and cats. 



204. M. pseudodiphthericum, (Kruse). 



Isolated by Hoffman, etc., from the healthy mouth and 

 throat; by Neisser-Kuschbert, etc., in xerosis and 

 other affections of the conjunctiva. 



205. M. moelleri. 



Isolated by Moeller from infusions of timothy hay. 



206. M. graminus. 

 Hay dust in lofts. 



