Reproduction of Cys topics Candidus , Ldv. 325 
Rosen (’92) describes the process of nuclear division in the 
Fungi as not altogether indirect, and simpler than in the 
higher plants. He was not able to observe any of the details 
of spindle-formation, &c., and states that the smaller the 
nuclei the simpler their division. I have already pointed out 
(’93) that his observations on nuclear division in the Basidio- 
mycetes are incomplete. 
Gjurasin (’93) shows that, in the division of the nucleus 
in the Asci of Peziza vesiculosa , a spindle-figure appears with 
protoplasmic radiations at the poles, that the granules in the 
nuclear network pass to the equator of the nucleus and divide 
into two halves, which move very rapidly to the poles of the 
spindle to form the two daughter-nuclei. 
Lister (’93), in his paper on the division of nuclei in the 
Mycetozoa, describes the division in the formation of the 
swarm-cells, and gives beautiful figures illustrating the various 
stages, which conform in general to what is known in the 
higher plants. 
In 1893-4 I showed that in the Hymenomycetes we 
have a very clear case of karyokinesis in the basidia ; 
spindle-figure, equatorial plate, protoplasmic radiations at 
the poles of the spindle, and probably centrosomes, being 
produced. 
Harper (’95) describes and figures beautifully the nuclear 
division in Peziza and Ascobolus , which is seen to follow 
almost exactly the normal course. 
Trow’s description of nuclear division in Saprolegnia (’95) 
is obviously incomplete. He states that the nuclei divide 
directly in the germinating zoospores, but that in the oogonia 
the division is indirect. The nucleus contains one chromo- 
some of irregular shape, which divides into two, producing 
two ‘ half-chromosomes.’ He regards the division therefore 
as a reducing one. In a recent letter to me, however, he 
states that c a long study of the work which has been done 
on the behaviour of the nucleus in gameto-genesis has led me 
to the conclusion that the network I have figured is a linin- 
network impregnated with chromatin, and the division figured 
