NUCLEAR BEHAVIOR IN PROMYCELIA 
47 
Fig. II. Cell division following immediately after the second nuclear division. 
Fig. 12. Passage of the elongated nucleus into the sporidium. 
Fig. 13. Nuclear division taking place in a sporidium that is still attached to its 
sterigma. 
Fig. 14. A uninucleate sporidium, showing the nucleolus outside the nucleus. 
This is probably a result of fixation. 
Fig. 15. A binucleate sporidium, showing the two nuclei rounded up and in a 
resting condition. 
Puccinia Peckiana 
Magnification 1000 diameters 
Fig. 16. A typical vegetative cell from the mycelium, showing the binucleate 
condition. 
Fig. 17. A germinating teleutospore. Both cells of this teleutospore are pro- 
ducing promycelia simultaneously. 
Fig. 18. A teleutospore which shows only one of its cells germinating. 
Fig. 19. A sporidium which has produced a germ tube. 
Fig. 20. A sporidium which has produced a germ tube on which is borne a 
secondary sporidium. 
