34 BOTANICAL GAZETTE [JULY 
thick “linin” bands; pair of chromosomes detached earlier lies at side of nucleus; 
n, small nucleolus; nucleus cut. 
Fic. 25.—Spirem more or less completely segmented into chromosomes while 
still in the second contraction stage; preparation considerably destained; 13 
apes in view. 
G. 26.—Spirem segmented, showing chain of eight chromosomes and three 
pairs; gee uncut. 
27.—Chain of six chromosomes, and probably four pairs; linin con- 
nections between members of a pair not always visible; nucleus uncut. 
Fic. 28.—Fourteen chromosomes; several small nucleoli; nucleus uncut. 
Fic. 29.—Fourteen chromosomes, including five pairs more or less closely 
associated; linin connections not visible; one pair of chromosomes has already 
contracted into the globular shape. 
Fic. 30.—Fourteen chromosomes, several in pairs; apparent inequalities in 
size due to positions in which some of the chromosomes are lying. 
Fic. 31.—Slightly later stage; the fourteen chromosomes contracted into the 
globular or pear-shaped definitive form; linin connections longer and extremely 
delicate; nucleus uncut. 
Fics. 32-34.—Other groups in diakinesis, showing various peculiarities of 
chromosomes. 
Fic. 35.—Peculiar case of spindle egies three nucleoli present and four- 
teen chromosomes, including three or four 
Fic. 36.—Multipolar stage of toes ants two more or less closely 
united pairs of chromosomes present. 
PLATE III 
Fic. 37.—Same as fig. 36; an unusual case in which all the chromosomes 
are closely joined in pairs; seven such pairs present and a small nucleolus. 
IG. 3 -—Heterotypic spindle in metaphase; sede has — more mantle 
fibers than in O. Lamarckiana; ually loosely arranged in equatorial 
region of spindle. 
Frc. 39.—Late anaphase; an uncommon case; daughter chromosomes have 
failed to divide, and fibrillae are scattered in cytoplasm at side of cell; chromatic 
staining material also present. 
1G. 40.—Telophase of heterotypic mitosis; exceptional case, in which a 
rather sharp pointed spindle is formed at side of cell; it probably originated from 
the fibrillae shown in fig. 39. 
Fic. 41.—Early anaphase of homotypic mitosis; small nucleolus having the 
ae appearance, present on one of the spindles. : 
. 42.—The single case of extra nuclei observed in O. rubrinervis pollen 
eee cells. 
Fics. 43, 44.—Nuclei from telophase of second mitosis, passing into resting 
condition. 
Fics. 45, 46.—Protoplasmic connections between mother cells. 
