LEVINE: CyTOLOGY OF HYMENOMYCETES 179 
Fic. 8. — hyphal cells from old mycelium showing clamp connec- 
S, anastomoses, hemispherical discs. 
Boletus ata ne 
Fic. 9. Cells from the stipe. 
Fic. 10. Cells from the ring. 
PLATE 5 
Polyporus destructor. 
Fic. 5. Binucleated cells from old mycelium. 
Fic. 6. Two adjacent binucleated cells with clamp connections, 
Boletus granulatus., 
Fic. 11. inucleated cells from the flesh of the pileus. 
Fic. 13. Young binucleated cystidiu 
Fic. 15. Mature and cin young pasa showing connection with hyphal 
cells in the trama. _ Line over mature cystidium indicates surface 
of Rare excreti 
Fic. 32. Cross section of ‘sii showing four daughter nuclei telophase 
age 
ge. 
Fic. 37. Four nuclei a little below the middle of the basidium attached to the 
tips of the sterigmata by fibrillar strands. 
Fic. 41. Basidium showing the nuclei in the sterigmata attached to the tips 
of the spores by fibrillar strands 
Fic. 42. Nuclear division in the spore in equatorial plate stage. 
Fic. 44. Same as FIG. 42, diaster stage. 
Boletus Ep SOnENS, 
FIG. 70. ary nuclei in basidium 
Fic. 76. siaaent division in spore ebaiae spindles with centrosomes and 
astral rays, equatorial plate stage. 
Boletus chrysenteron. 
Fic. 77. An abnormal basidium showing one of the sterigmata fully formed 
while the two daughter nuclei are still dividing. 
PLATE 6 
Boletus granulatus. 
Fic. 14. Mature and young cystidia. 
Fic. 16, 17. Young basidia with primary nuclei preparing to fuse. 
Fic. 18. Basidium showing nuclear fusion 
FIG. 19, 20. Basidium with nucleus in spirem stage. 
Lo: 
Se 
Fic. 23. First nuclear division showing eight chromosomes, metaphase. 
Fic. 25. The chromosomes moving toward the poles, ana 
Fic. 25a. The chromosomes at the poles before fusing, diaster. 
Fic. 26. Cross section of basidium showing two young danaktec nuclei, 
telophase. 
Fic. 27. Diaster, second division, a number of nuclei at each pole. 
Fic. 28, 29. Cross section of basidium, same as FIG. 27; chromosomes fused 
into two masses. 
Fic. 30, 31. Early telophase of the four daughter nuclei. 
