286 
The Ohio Naturalist. 
[Vol. VIII, No. 5, 
Fig. 5. A pair of daughter nuclei remaining unusually close together 
(one cut in sectioning); rays of the centrosome prominent and granular, 
bending around the nuclear vacuole on the side opposite the centrosome, 
but not yet met to complete the membrane. 
Fig. 6. A cone of tapering astral rays enfolding the nuclear cavity 
and bending around beyond it; prominent granules on the nuclear mem¬ 
brane. 
Fig. 7. Muclear membrane almost complete by the meeting of the 
rays. 
Fig. 8. Nucleus showing a banded condition similar to a spirem; the 
bands probably derived from the four chromosomes. 
Fig. 9. A nucleus with three distinct asters connected by heavy 
radiations. 
Fig. 10. A nucleus in a spirem-like condition with two centrosomes 
forming, with their radiations, a figure like an amphiaster. 
Fig. 11. A nucleus showing the gradual genesis of the nuclear wall 
on the side next the centrosome; also a large deep-staining granule sur¬ 
rounded by a vacuole. 
Fig. 12. An aster with a large rather diffuse centre and numerous 
very fine rays; nuclear membrane complete but still associated with the 
ravs. On the membrane of both this and the portion of the sister nucleus 
are conspicuous granules lying in different positions with respect to the 
nuclear wall. 
Fig. 13. Centrosome more diffuse than in fig. 12; nuclear membrane 
disturbed by knife. 
Fig. 14. Nucleus in spirem sage with a large mass of dense cytoplasm 
at one side which is interpreted as the end stage of the centrosome. 
Just as this number goes to press telegrams bring the sad in¬ 
telligence of the death of Professor W. A. Kellerman in Guate¬ 
mala. Professor Kellerman was one of the most active in the 
founding of the Naturalist, a member of its advisor}' board since 
the beginning, and its volumes include a large number of con¬ 
tributions from his facile pen. He was a most enthusiastic and 
untiring worker and the rich collections which he has brought 
together, representing the flora of home and foreign countries 
will be a permanent evidence of his devotion to science. 
Only meager information concerning his illness is at hand, but 
we learn that interment will be made in Guatemala, in the region 
which has been the scene of his latest work and which he had 
explored with a delight born of love for its beauty of scenery 
and wealth of life. 
We must reserve for a later number fuller details, and the 
appreciations merited by his work. H. O. 
