49 
ae aggregate, composes in the same environment of constantly 
terblending races, forming networks probably 
impossible for systematic study ever fully to unravel. In many 
species, however, races are more or less geographically localized, 
often evidently in response to environment, and the systematist. 
can oar should recognize these, note eas et and kin- 
races are quite clearly defined. “Tilastrations of such were shown - 
a Mi a eolari 
A. B. Stout, 
Secretary 
NOTES, NEWS AND COMMENT 
Professor E. A. Burt, mycologist of the Missouri Botanical 
Garden, ae ihe Garden deusiaes 12-17 to examin en col- 
lection of TI herbarium e has 
been publishing a series of papers on this important and oe 
ich he h it! 
1 
spade given by Professor a er on the evening of February 
16 at the Columbia Faculty Clu 
An article on the discovery of the chestnut canker in Japan 
Fr N. Mey 
Mr nk eyer appeared in Science February 4, 1916, 
contributed b Shear and Neil Stevens. About two 
years ago, yer discovered the chestnut canker in China 
In a letter dated September 20, 1915, Mr. Meyer stated that the 
chestnut canker is quite common in Japan, least around 
hama, b ild 
cane attacked but showing ee power of resistance. 
