180 LEVINE: CyTOLOGY OF HYMENOMYCETES 
Fic. 33. Four nuclei beginning to move toward base of basidium, nucleus to 
right is attached to centrosome on basidium wall by kinoplasmic 
fibers. 
Fic. 34, 35. Early stages in the development of the sterigmata, fibrillar 
strands connect the nuclei and the tips of the sterigmata 
Fic. 45. Young four-nucleated hymenial cell in which nuclear division was 
not followed by cell division. E 
Boletus castaneus. 
Fic. 72. Cross section of basidium, first division, the chromosomes massed 
together 
Ne ett dene 
Fic. 73. Same as FIG. 72, six to eight chromosomes. 
Fic. 74. Nuclei moving to base of basidium. 
PLATE 7 
Boletus granulatus. 
Fic. 12. A cluster of cystidia forming a gelatinous granule, from the mouth 
of a S ; 
Fic. 24. pan division in the basidium, anaphase, showing a number of 
osomes, the poles lying on the basidium wall. 
Fic. 36. ena with four nuclei attached to young sterigmata. 
Fic. 38. Basidium with very young spore buds. 
Fic.:.30., A se older sot fibrillar strands distinctly visible running 
the spore body connecting centrosomes an ei. 
Fic. | 40. older stage; fibrillar strands; nuclei moving toward the spores. 
‘ Boletus albellus. 
Fic. 61. — nucleus with a conspicuous red-staining body lying between 
and the basidium wall. 
Fic. 62. ia division, anaphase, with well-marked centrosomes and astral 
ays 
rays. 
Fic. 63. Nucleus in a sterigma. 
tus castaneus 
Fic. 71. A spirem stage. 
Fic. 75. Basidium with the nuclei in the sterigmata, attached by fibers to the 
entrosomes at the apices of the spore. 
Boletus cr ahs 
Fic. 78. Nuclei énacies to the tips of sterigmata by kinoplasmic fibers. 
Pe. 79. Nuclear division in the spore; spindles with centrosomes and astral 
rays. Chromosomes in equatorial plate stage. 
PLATE 8 
Boletus granulatus. 
Fic. 43. Nuclear division in spores, anaphase. 
Fic. 46. Basidia with primary and secondary nuclei. 
Fic. 47, 48, 49. Nuclear fusions in the basidium. 
Fic. 50. Spirem s tight 
