THE CYTOLOGY OF THE SUGARCANE 499 
munication of Mr. J. R. A. M. SCHMUTZER, the present administrator 
of that plantation however, KARTHAUS should not have used Bandjer- 
massin hitam, but Lahaina as the mother. This tallies with the fact 
that seedlings of Lahaina-cane, obtained by the Experimentstation 
Pasoeroean, show groups of hairs on the budscales which are typical 
for the EK numbers mentioned. We must therefore count with the pos- 
sibility that Lahaina-cane was really the mother of these sugarcane- 
kinds. 
Of EK 28, obtained in 1912 by the „Zaadrietkweekerij en Zaadriet- 
handel Kartuaus Ltd”, the origin is unknown ‚according to JESWIET it 
is very probable that one of the parents is EK 2, to which EK 28 shows 
great similarity, especially in the arrangement of the hairs on the bud- 
scales. It does not appear to be impossible to him, that EK 28 is the 
result of a cross of 100 POJ with EK 2. With 100 POJ it shows simi- 
larity in colour, while it also flowers abundantly and gives a splendid 
crop. 
Of the sugarcane-kinds SW 1—SW 111 of the sugarplantation Sem- 
palwadak, of which SW 3 and SW 111 are the most important ones, as 
well as of the sugarcane-kinds DI 43—DI 89 of the plantation Demak 
Idjo, of which DI 52 is a very important one, it is certain that they 
were obtained by crossing Black Cheribon 2 with Batjan 8. 
The cultivated kinds SW3, SW 111, 100 POTWER nd ERS28 
have, so far, been investigated cytologically. Of the cultivated kind 
DI 52, which did not flower in the Experimentstation in recent years, 
the chromosome number in the roottips only could be investigated and 
this does not allow of a very accurate determination. 
Of the sugarcanekind 247-B, we saw already in the first part, that 
the haploid number was 40. As to the parents of the sugarcanekinds 
cultivated, we described in that part: F idji, Batjan and Bandjer- 
massin hitam. All of these proved to possess 40 chromosomes in the 
haploid phase. Of Black Cheribon we mentioned in that part only that 
approximately 80 chromosomes were found in the root-tips. As to 
Loethers we communicated in a note, that a preliminary investigation 
gave 50 as the probable haploid number. The Lahaina-cane is not men- 
tioned in the first part. 
We consequently give in this part, in connection with the origin of 
the cultivated sugarcane-kinds, also the results of the cytological inves- 
tigation of Black Cheribon, Lahaina and Loethers. 
