AND SPECIES-HYBRIDS WITHIN THE GENUS SACCHARUM 305 
only as a consequence of incomplete pairing in the prophase. Counts 
of chromosomes in polar views of nuclear plates gave numbers close to 
70. In the nuclear plate pictured (fig. 89) of an indvidual from the 
cross sugarcane Bandjermasin hitam X Glagah Kepandjen 71 chromo- 
somes were counted. In as much as the total number of preparations 
Fig. 88. 
Fig. 88. Pollenmothercell in 
diakinesis of a hybrid indivi- 
dual from the cross Saccharum 
officinarim x S. spontaneum 
(Individual G 106 = Striped 
Preanger x Glagah alas Troeno 
x 2300). 

was not yet very large a very few counts 
of anaphase only could as yet be executed. 
Fig. 90 pictures an anaphase in polar view 
of the hybrid individual G. 106 from the 
cross ‚Striped Preanger x Glagah alas 
Troeno. 
In the upper group 61 chromsomes were 
visible; focussing lower down revealed 
the presence of 10 univalent chromoso- 
mes still lying on the aequator, while still 
lower adjustment made the lower group 
with 64 chromosomes appear. Probably 
some unpaired chromosomes had been 
drawn as a whole towards the lower pole; 
it is also possible that some chromosomes, 
belonging to the aequatorial group, were 
counted as members of the lower one. 
The total number of chromosomes 
counted in this anaphase was 135; this 
would point to a haploid chromosome- 
number of 67 or 68 if the pairing had 
been complete. Fig. 91 shows an anaphase 
of the individual G. 107 from the same 
cross. In both anaphase-groups 64 chro- 
mosomes were counted, while 7 unpaired 
ones were found on the aequator. This 
points towards a diploid chromosome- 
number of about 135 and to a haploid 
number of approximately 68. 
Fig. 92 gives an anaphase of Kassoer. In the uppergroup 61 chromo- 
somes were counted; there were 12 in the aequator and 59 in the lower 
group, but the latter group had been touched by the knife. 
It resulted from the corresponding arrangement of the chromosomes 
Genetica V 
20 
