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G. R. BISBY 
Fig. 6. Almost mature capillitial threads in which the lumen is not evident. 
X 1,000. 
Fig. 7. A stage approaching maturity, in which a space is shown surrounding 
the capillitial thread. X 1,000. 
Fig. 8. The cleavage furrows are limited by the capillitial threads, which appear 
in cross-section in the preparation, or else are cut somewhat obliquely. X 1,000. 
Fig. 9. A preparation taken from a similar stage, showing a cleavage furrow 
following in part the hollow capillitial thread. X 1,000. 
Fig. 10. Another similar, but somewhat older, stage of cleavage. X 1,000. 
Fig. II. Showing the attachment of the sporangial wall and a lime knot. 
X 750. 
Fig. 12. A mature capillitial thread, containing two small lime knots; and a 
spore shown for comparison. From a mature, crushed sporangium. X 750. 
Fig. 13. Another capillitial thread, showing branching and the occasional 
spine-like projections. X 1,000. 
Fig. 14. Surface view of a portion of the wall of the sporangium, showing a 
large lime knot, small lime granules, and the yellow (shown as darker) pigment 
granules. X 1,000. 
Fig. 15. Diagrammatic drawing of a mature sporangium, showing expanded 
base, hollow stalk, funnel-shaped sporangium, sporangial wall, and the radially 
arranged capillitium and lime knots. X about 20. 
Figures 16-21, Stemonitis fusca. 
Fig. 16. Upper portion of the space in which the columella is to be formed; 
showing thin columellar wall, protoplasmic inclusions, and the vacuolated area in the 
path of the rising axial cavity. X 250. 
Fig. 17. Young stage in capillitium formation; showing a space in which no 
perceptible deposit of wall substance has as yet been made. X 1,000. 
Fig. 18. Late stage in the development of the capillitium, showing attachment 
to the columella. X 750. 
Fig. 19. Similar condition to figure 18, but showing columella in cross-section. 
X 750. 
Fig. 20. A preparation from the peripheral portion of a sporangium, showing 
cleavage begun; together with a small fragment of the delicate, subperipheral, 
anastomosing, capillitial sac. X 750. 
Fig. 21. A portion of the fragile, evanescent sporangial wall, showing a small 
capillitial thread attached. X 1,500. 
Fig. 22. Small portion of capillitium, from a mature sporangium, showing 
anastomosis, and the hollow character of one thread. X 1,500. 
