NOTES. 
47 
tion of the chromatin occurs during the second division of the 
pollen mother cell. The sperm nuclei, resulting from the division 
of the “ generative cell ” do not organize separate sperm cells, 
but are free in a common mass of cytoplasm, thus forming a 
binucleate cell. One sperm nucleus is larger than the other. 
The formation of archegonia precedes fertilization by about 
two weeks. During fertilization there is no fusion of the male 
and female chromation, and during the first cleavage of the fer¬ 
tilized egg the two groups of chromosomes remain distinct on 
the spindle. 
Any adequate review of the paper is beyond the limits of space 
at our command. It is by far the best work that has been done 
on Pinus. C. S. G. 
NOTES. 
We publish this month in addition to the regular matter a 
Supplement containing an account of the first week-long field 
meeting of botanists ever held in this country. In addition to 
the intrinsic interest of the material presented the record will 
certainly be of great historic interest in the future. 
“ The establishment during recent years of biological sta¬ 
tions in various parts of the world has proved to be of the greatest 
importance in furthering the progress of science. The great 
station of Naples has now a worthy competitor at Wood’s Hole, 
and the botanical laboratory at Buitenzorg is aptly represented 
in this country by the Carnegie Desert Laboratory. The already 
large number of lesser institutions of similar nature is rapidly 
increasing, both in this country and abroad, and all add to the 
opportunities available for the working biologist. Up to the 
present time the foundation of such stations has been confined, 
however, to regions with temperate or tropical climate, and no 
attempt has been made to establish a permanent station for bio¬ 
logical research within the Arctic, until recently. A Danish bot¬ 
anist, Morten P. Porsild, has proposed to his government the 
appropriation of funds for such a station, to be located on the 
southern coast of Disko Island in North Greenland, not far from 
the colony Godhavn (lat. 69° 15' N.). . . . The geographical 
