Reproduction of Cystopus Candidus , Ldv. 309 
endospore ; they resemble by their size and other properties 
those which have been seen in the vegetative organs. 
He arrives at the conclusion that of the nuclei of the 
oogonium some remain in the oosphere, some in the peri- 
plasm ; to the nucleus in the oosphere are probably added 
those of the antheridium, although he found it impossible 
to observe their passage. In any case the ripe oospore 
contains about twenty nuclei. The oil globule grows little 
by little until it forms the large central globule of the ripe 
oospore. 
He was not able to observe any fertilization, and did not 
observe the division of the nucleus in the oogonium nor in the 
oospore. He accepts Zalewski’s observations on the structure 
of the wall of the ripe oospore. 
Mangin (’91) describes the disarticulation of the sporangia 
in C. candidus. When a sporangium is about to form, a thin 
ring of callus appears near the apex of the basidium. This 
gradually grows inwards until a transverse partition has been 
completely formed, of a convex or conical shape, the concavity 
being towards the sporangium. The cellulose wall in contact 
with this transverse partition at the edge becomes resorbed, 
and a constriction is produced by an apparent contraction 
and thickening of the callus partition. This proceeds 
rapidly, and ultimately the callus forms a little cup-like 
formation at the base of the sporangium, by which the latter 
is attached to the basidium. The author was not able to 
observe the division of this layer into three as observed 
by De Bary and Zalewski. Ultimately the callus-like 
substance becomes reduced to a short cylindrical mass con- 
necting the sporangium to the basidium, and the cellulose wall 
both of the basidium and the sporangium ultimately extends 
all round on both sides of the callus. The portion of callus 
left between them slowly acquires the property of dissolving 
in water by which the sporangia are set free. 
When the basidia have formed a number of sporangia their 
activity ceases, and as the hyphae are interrupted here and 
there by masses of callus which stop communication with the 
