292 J. E. 8S. MOORE. 
separate from one another), and inserts a conical termination 
into both (figs. 53, 54); but the delicate filaments into which 
these terminations are prolonged, after the translocation of the 
spheres from the polar to the equatorial surface of the recon- 
structed nuclei, disappear, the last function of the remains 
of the outer and inner spindle-tube being to form an open 
connection with an equatorial chromatic band (the inter- 
mediate bodies) between the daughter-cells (0. 7., figs. 56, 57, 
58, 59). 
35. The spheres, during their passage from the polar to the 
equatorial nuclear faces, pass in a more pronounced manner 
through a similar metamorphosis to that described in 
§ 22, and which, when rightly understood, appears to be 
of the most profoundly interesting nature. When the archo- 
plasm (a, figs. 58, 59) has reached some point halfway between 
the pole and the equatorial nuclear side, it begins to move 
away from the nucleus, while the centrosomes, travelling faster 
in the same direction, pass from the centre to the surface of its 
mass (figs. 58, 59, c.). From this point (c.) there grows out a 
fine protoplasmic thread (fig. 59, f.), extending to the cell 
periphery. The cell membrane is indented slightly where the 
thread approaches it (fig. 59), but the thread itself is pro- 
longed beyond it as a fine protoplasmic process, comparable toa 
short flagellum (figs. 59—64, f.). By the time this structure has 
been formed the archoplasms of each daughter-cell are more or 
less facing each other, with the tubular remains of the spindle 
stretched between (figs. 59 and 61). 
36. When the cells come perfectly to rest, there appears on 
each side of the archoplasm, or in its immediate vicinity, a 
marked condensation of the cytoplasmic substance (fig. 62, x.), 
which, in the absence of the attraction sphere, might readily 
be taken for an enlarged representative of that body ; and as 
this mass is of some importance in understanding the process 
of conversion of the next generation of cells into the sperma- 
tozoa, I shall speak of it as the Nebenkern. 
37. Before the prophasis of the next division, the remains of 
the spindle become no longer visible between the cells, and 
