502 THE CYTOLOGY OF THE SUGARCANE 
some chromosomes, lagging behind, were frequently seen in the ana- 
phase-stage. Normal tetrads were always met with. 
Lahaina. This cane also shows an irregular reduction-division. In the 
anaphase of the division a smaller number of univalent chromosomes 
was seen than in the case of Black Cheribon. Sometimes such chromo- 
somes were even quite absent, so that the reduction-division was nor- 
mal. Pollen-mothercells dividing irregularly were however much in 
the majority. Counts made in anaphase-stages, viewed from one of the 
poles, showed that 80 is the diploid number of Lahaina. 
Fig. 3 pictures an anaphase in which 80 chromosomes could be coun- 
zn ted. During metaphase 41 and 42 
FL CA chromosomes were repeatedly coun- 
Lo EN ted, which points towards a small 
number of univalent ones. In the case 
of this cane also, the pollen-tetrads are 
Nye sy formed in the normal way. 
Anaphase of the heterotype divis- Loethers. Diakinese-stages and 
One being, peen Monstres ce metaphase ones did not allow certain 
poles 72300. 
counts. Anaphase-stages showed the 


diploid num ber to be 98—99. 
F Univalent chromosomes were present in variable numbers. 
F Fig. 4 shows an anaphase in which 99 chromosomes were very clearly 
seen. The upper group contain- 
' 
onset, où > À 50, ed 48, the lower one 47, while 4 
2 Kees e SR a had lagged behind in the 
nee eo ue aequator. The arrangement in 
o 3 eo! 74) the GEDE CONS 
ee /@ GPO clearly with the one in the lower 
FIE group, but the former contains 
Anaphase of the heterotype division of ao additional chromosome, 
Loethers, viewed from one of the poles. x 2300. responding to an empty spot in 
the latter. The diploid chrom- 
osome number of Loethers is consequently higher by 19 than that of 
the Saccharum officinarum-forms. 







