130 A CYTOLOGICAL INVESTIGATION OF SOME SPECIES 
fig. 20 one sees the two nuclear plates viewed from the poles, the chro- 
mosomes are almost isodiametric. They are smaller than the gemini, 
are pretty close together and but rarely can be counted with certainty. 
In this case both plates clearly revealed the presence of 56 chromosomes. 
Fig. 21 shows the case that the axes of the nuclear spindles cross one 
another rectangularly. Consequently the one plate is seen in side-view, 
and shows the chromosomes as short, somewhat laced, bodies. In the 
other plate, viewed from one of the poles, 57 chromosomes are present, 
probably due to the fact that one of them has already split longitu- 
dinally. 

Fig. 20. Fig. 21. 
Fig. 20. Metaphase of the homotypic division of Saccharum spontaneum (Gla 
gah alas Djatiroto). Both nuclear plates viewed from the poles x 2300. 
Fig. 21. Idem, one plate viewed from above, the other from the side x 2300. 
Fig. 22 shows the anaphase of the homotype division; the exact num- 
ber of chromosomes could not be determined as they cover one another 
too much. The drawing was made to show that, here also, there is no 
question of chromosomes lagging behind. 
The origin of the tetrad, during which process the cellwalls are for- 
med, and the chromosomes are visible in the 4 nuclei, is pictured in fig. 
23, while fig. 24 shows us the tetrad upon completion. Young pollen- 
