192 BOTANICAL GAZETTE [SEPTEMBER 
plants were used to some extent, as was also Phycomyces nitens. 
The flowering plants were injured by removing the roots asa 
whole or in part, or by splitting the roots near the base or near 
the tip; or the shoots or leaves were removed as a whole or in 
part. Specimens of Phycomyces were injured either by cutting 
away a mycelium or by removing one of the two or more spo- 
rangium stalks. In the case of the higher plants a gradual 
change in the rate of growth took place, and became marked in 
from six to twenty-four hours after injury. The influence of 
the irritation extended through a distance of from 0 to 300™", 
although this is by no means considered to be the limit through 
which the influence of injury is capable of acting. The change in 
rate of growth after injury varied from o to 80 per cent. of the 
normal rate. In the case of Phycomyces the rate of growth 
was reduced immediately after injury, and recovered its normal 
rate in from thirty to sixty minutes. In no case examined did 
the growth entirely cease. 
W. W. Row tee and K. M. Wiecanp: Zhe botanical collection 
of the Cornell Arctic Expedition of 1896.—Read by title. 
Erwin F. Smitu: Description of Bacillus phaseoli, n. sp.— 
Bacillus phaseot is a short rod with rounded ends, yellow on 
various media, motile in early stages of growth, and decidedly 
pathogenic to beans and some related legumes, causing water- 
soaked spots on the pods. Its thermal death point (ten minutes 
exposure) is approximately 49° C., and it will not grow in the 
closed end of the fermentation tube with any of the common 
sugars. This organism is closely related to Bacterium hyacinth 
Wakker and Bacillus campestris Pammel, two other motile yel- 
low germs. It has been under observation in pure cultures for 
about thirteen months, and there is no doubt whatever as to its 
parasitic nature, all of Koch’s canons for determining this point 
having been complied with. The three organisms here men- 
tioned were compared and contrasted, and cultures of each 
exhibited, also photographs, paintings, and dried specimens. 
Erwin F. Smirn: On the nature of certain pigments produced 
by fungi and bacteria, with special reference to that produced by 
