282 J. HS. MOORE: 
until the chromatin eventually forms two solid chromatic rings, 
one in each daughter-cell (figs. 25, 26). 
14. About this time the outer spindle-fibres begin to 
spread so widely in the equatorial plane (fig. 24) that they 
actually come in contact with the membrane of the cell, and at 
each of these rather angular connections there appear slight 
thickenings of the fibres (07.), which stain, and thus constitute 
an interesting stepping-stone between the true cell-plate and 
Flemming’s! intermediate bodies. 
The chromatic rings now gradually lose their original con- 
nection with the outer spindle-fibres, which begin to bulge out, 
and pass round them to the poles (fig. 27’) ; the chromatic rings 
are thus left in a surrounding vacuole, but the core of fibres 
(0.5s.,%. s., fig. 27 a) still passes through them to the poles. The 
bulging out of the spindle-fibres round the nucleus increases, 
and is accompanied by a corresponding collapse of the same 
in the division plane of the daughter-cells (figs. 25, 26, 28). 
This brings the outer and the inner spindle-tube together in the 
division plane (figs. 26, 27, 28), and the whole spindle figure at 
last acquires the appearance of a sharply differentiated fusiform 
body between the daughter-cells (fig. 27 a). The terminal por- 
tions of this body (the remains of the spindle-fibres) as they pass 
round the daughter-nuclei (fig. 27 a, n.g.), are at first distinctly 
seen, but they become shortly indistinguishable from the sur- 
face of the vacuole and are consequently lost; but the conical 
extremities of the fusiform equatorial portion which remains are 
still prolonged as delicate protoplasmic filaments, which extend 
towards the nuclei in each daughter-cell (figs. 29, 80). These 
thread-like prolongations are the remains of that inner core of 
spindle-fibres above described (§ 12) as passing through the 
daughter-rings. In apolar view (fig. 27, /.) they perforate the 
daughter-nuclei very much to one side, and the little orifice (0.) 
is all that is left of the originally wide passage through the 
chromatin. 
15. The closing up of the chromatic rings commences on 
the equatorial side, and is produced by the formation of a 
1 Flemming, loc. cit. 
