89 
spicuous white margins. On this plant there has developed a 
bud with the tissue relations reversed, 7. ¢., the green tissues of 
the leaves and the stems of this branch are enclosing the white 
tissue, giving leaves that are larger, more deeply lobed and 
which do not possess the white margins. The white tissue can 
be seen ee the center of the leaf beneath the outer green 
yers s a type of bud variation that is due to the me- 
veer tpn of two different tissues which are already 
present in the plant. Brief reference was made to the various 
interesting observations that Baur has made in his studies of 
chimeras in Pelargonium zonale. 
NOTES, NEWS AND COMMENT 
Professor R. A. Harper, of Columbia University, Bpent several 
days during the holiday vacation visiting relatives in the West 
returning by way of Cleveland where he attended the scientific 
meetings of the A. A. A. S. 
Eliot Blackwelder, associate professor of geology in 
University of Wisconsin and geologist of the U. S. eae 
Survey, visited the Museum on December 27 to examine the 
collections of calcareous algae, which interested him in con- 
nection with his studies of the nature and origin of certain 
western limestones. 
Mr. Norman Taylor, curator at the Brooklyn Botanic Garden, 
spent ten days at the Garden during the holidays studying the 
collection of local plants. 
Dr. John K. Small recently returned from a collecting trip to 
tropical Florida. About five weeks were spent in the field, part 
of the time in company with Professor Hugo de Vries, of the 
University of Amsterdam. Collections were made on the less 
explored parts of the Miami limestone region and the Florida 
Keys. 
Dr. Arthur Hollick returned on January 1 from a three months 
leave of absence in Washington, D. C., where he was at work 
