108 BOTANICAL GAZETTE [avcust 
(’95) On spore formation and nuclear division in Hepatice, Ann. 
Bot. 9 :46 
JuEL(’97) Die Kerntheilung in den Pollenmutterzellen von Hemerocallis fulta 
und die bei denselben auftretenden Unregelmassigkeiten. Jahrb, f. wiss. 
Hot, 90+ Fi: 
LAWSON (’98) Some observations on the development of the karyokinetic 
spindle in the pollen-mother-cells of Cob@a scandens Cav. Proc. Calif. 
Acad. Sci. Botany 1: 169. 
Mortikr (’97) Beitrage zur Kenntniss der Kerntheilung in den Pollenmutter 
zellen einiger Dikotylen und Monokotylen. Jahrb. f. wiss. Bot. 30: 
OsTERHOUT (’97) Ueber Entstehung der karyokinetischen spindle bei Equ- 
setum. Jahrb. f. wiss. Bot. 30: 5. 
STRASBURGER (’80) Zellbildung und Zelltheilung. 
(’988) Lehrbuch der Botanik, dritte Auflage. 
(’98b) Die pflanzlichen Zellhaute. Jahrb. f. wiss. Bot. 31: — 
EXPLANATION OF PLATES IX AND X. 
All preparations were studied under a Zeiss oil immersion 2” ape 1,30 
with compensation-oculars. Figures were sketched with an Abbé camera | 
at the following magnifications, Rigs. 3-7, 9, 10, 12, 10-21, 24-2]) magnified 
1000 diameters; 7, 2,8, 77, 73, 74, 15. 22, 1500 diameters and fig. 23; 2250 
diameters. 
All preparations except that shown in fig. 2 from material fixed! 
Flemming, sectioned Sy thick and stained on the slide; figs. 4) 45) 
and 23 from slides stained with iron-alum-haematoxylin after the mete” 
Haidenhain ; all other figures from preparations stained with Flemmings 
triple stain, safranin, gentian violet, and orange G. 
PEATE LX. 
Fic. 1. Nuclear figures from archesporium, just after the spli 
: : each 
chromosomes whose number is large, apparently about sixteen, eight for nat 
daughter nucleus. 
Fic. 2. Nuclear figure from antheridium, four chromosomes. 
FIG. 3. Spore-mother-cell, early condition of chloroplast with 
four grains of starch, ; 
1G. 4. Spore-mother-cell in more advanced condition than Ig J 
network more prominent, chloroplast elongating preparatory to division + °" 
grains prominent. 
G. 5. First division of chloroplast. 
Fic. 6. Two chloroplasts, linin network prominent. 
FIG. 7. Synapsis, two chloroplasts. 
Fic. 8. Nucleus emerging from synapsis. 
wt 
n weak 
tting of the 
three OT 
