CATALOGUE OF PLANTS. 617 



SPIRILLUM, Ehrb. 



S. Undula (Mull.), Ehrb. 



In bog-water and various infusions. 



MIOROOOCCUS, Conn. 

 M. luteus, Cohn. 



On boiled potatoes, etc. 

 M. aurantiacus, Cohn. 



On boiled potatoes, etc. 

 M. ureae, Cohn. 



In urine. 

 M. crepusculum, Cohn. 



In various infusions and decomposing substances, accompany- 

 ing Bacterium termo. 



M. vaccinse, Cohn. 



In vaccine virus and the pock-pustules of small-pox. 

 M. diphtheriticus, Cohn. 



Accompanying diphtheria. 

 M. septicus, Cohn. 



In wounds, accompanying pyaemia and septicaemia. 

 M. amylovorus, Burrill. 



"The cause of blight in plants, especially of pear and apple 

 trees."* 



M. toxicatus, Burrill. 



"Apparently parasitic on species of Rhus (Poison Oak, Poison 

 Ivy), and constituting the poisonous principles of these plants." * 



The list of foreign plants introduced on ballast grounds at Cam- 

 den, Communipaw and Hoboken, printed in the Preliminary Cata- 

 logue, is not republished, as many of the species have long ago dis- 

 appeared from those localities. 



* Burrill, I c., p. 42. 



