40 
Araceae 1900 
Aglaonema commutatum 2? Campbell on pathological 
1912 
Nephthytis Liberica 4 Campbell 1905 | pathological 
Aglaonema pictum 5-nucleate | Campbell ne D-Ila-3b 
Aglaonema versicolor (6-15 nucleate) Gow 1908 |? ? 
Agfsonemnn. simplex S-nucleate | Campbell | 1912 | D-Ila-3b 
Aglaonema modestum 
Juglans regia according to Karsten (1902) shows a quite nor- 
mal development of the chalazal group. At the other end how- 
ever only three nuclei should be formed, viz. the egg, the upper 
polar nucleus and one synergid, which should correspond to the 
formule D—-IIb—la. As the publication dates from 1902 con- 
firmation of this condition is wanted. The more since other 
Juglandaceae are reported to be quite normal in this respect. 
Moreover the author mentions some details which he could not 
explain sufficiently. 
First of all his statement that polars never fuse and even 
are often found wide apart. Secondly the fact, that the two 
nuclei at the micropylar end, which should represent the egg 
and the synergid, show no difference in size or construction. 
And thirdly his mentioning three cases of sacs in which, after 
fertilization, three dividing nuclei were seen, both nuclei at the 
top (synergid and egg!) still being undivided. The author's ex- 
planation is, that the second male nucleus has fused with one 
polar only. The figures should represent the second mitosis of 
this fusion-nucleus and a first division of the other unfertilized 
polar nucleus. A very doubtful hypothesis indeed. 
Is it not safer to ascribe to Juglans regia a normal egg-appa- 
ratus? Of course this is a suggestion only, which needs verifi- 
cation by a renewed investigation. But Karsren’s publication 
itself seems to contain rather strong arguments in its fayour. 
It is stated that cellformation occurs very late in Juglandaceae, 
in Juglans nigra even not before fertilization. In my opinion 
the two “polars, never fusing and often wide apart‘ are no 
polars, but the egg and the fusion nucleus, Juglans regia being 
8-nucleate and quite normal except as to the cell-formation of 
