ae Aa ee ee 
1900] STRUCTURE AND REPRODUCTION OF COMPSOPOGON 267 
EXPLANATION OF PLATE XXI. 
The figures were drawn with camera, the following Zeiss objectives and 
eyepieces being used. Figs. 7-6 and 9g obj. J (water immersion) oc. 4. 
Figs.7,8and z0 obj. J oc. 2. Figs. 12-14 obj. A oc. 2. Fig. 17 obj. D oc. 
4. Figs. 72 and 77 are drawn from the Daytona material, the remainder 
from that obtained at Cocoanut Grove. All the figures reduced about + in 
photo-engraving. 
Fig. 1. Portion of young filament showing three macroaplanosporangia. 
Figs. 2-6. Further development of the sporangium shown at the right 
in fig. z, the macroaplanospore discharged in figs. 5 an 
F . Portion of cortical layer of older filament ci seven macro- 
Se esccansia i in which the aplanospores are nearly mature. 
FIG. Surface view of sorus of microaplanosporangia. 
Fig. 9. Microaplanospores. 
Fig. 10. First stages in the formation of sori in younger filament. 
Fig. 11. Small sori on younger filament. 
Fics. 12-13. Transverse section of older filaments showing multiple 
cortication. Some of the superficial cells have formed macroaplanosporangia. 
Fic. 14. Longitudinal section of filament with simple cortication. 
