Bacillus. 89 



rods it forms spores, colourless, very refringent, of a 

 spherical or slightly oval form, like those of a Bacillus. 



In the rain-water which filled the cavity of the pileus 

 of a young Polyporus, forming a thin layer. 



This can scarcely be a Bacterium. The colouring matter, according 

 to Van Tieghem, is true chlorophyll. He compares it to B. lucens. 



Wakker records (Bot. Centralblatt, 1883, p. 315) a Bacterium 

 resembling .#. Termo, causing the " yellow disease " of hyacinths. It 

 occurred in a yellow slime in the bulbs in autumn, and in the leaves 

 in spring. He calls it B. hyacinthi. 



BACILLUS. 



105. B, crassus, Van Tieghem (Bull. Soc. Bot. France, 



1879, p. 142). 



Cells motionless, large, resembling B. Ulna, 4 //. broad 

 during active growth, 5-6 p. when forming spores. Spores 

 spherical, 5 //, in diameter. 



The spores of this species are the largest known among 

 the Schizomycetes. It does not produce starch. 



1 06. B. malariae, Tommasi-Crudeli (Atti R. Accad. 



Lincei, Trans., vi., 1881, p. 19). 



In the spleen, the medulla of bones, the lymphatic 

 glands, and the venous blood of persons suffering from 

 malarial fever. The evidence of the existence of this 

 species is at present unsatisfactory. 



107. B. puerperalis, Engel (Comptes Rendus, Ixxxviii., 



1879, p. 976). 



In the blood of a woman who had died in childbirth. 

 Engel observed the production of conidia. 



1 08. B. mollusci, Domenico (Atti R. Accad. Lincei, 



Trans., v., 1880). 



Resembling B. lepra. In the nodules of Molluscum 

 contagiosum. 



