King. —Cytology of Araiospora. 
PLATE 15. 
The figures are from photomicrographs taken with a Bausch and Lomb 1 
inch eye-piece and objective. 
Fig. 32. Represents the same section as figure 16 and shows the origin of the 
fertilization tube and the receptive papilla in the act of per¬ 
forating the separating walls. A peripheral cell is in dim focus 
at the left of the receptive papilla. Magnification, 700. 
Fig. 33. Ripe oosphere showing the egg nucleus and the size and general 
appearance of the differentiated central ooplasm. Magnification, 
800. 
Fig. 34-35. Represent the sections drawn in figures 20 and 21 respectively. 
The empty antheridium almost out of focus shows dimly in fig¬ 
ure 34. Both represent the pointing nuclei. Magnification, 600 
and 618. 
Fig. 36. Corresponds to figure 24. The fine meshed central ooplasm has 
spread out into the oospore and has reached the periphery. There 
are no indications of an oospore wall. Magnification, 670. 
Fig. 37. Thicker walled binucleated oospore representing a stage between 
those shown in figures 27 and 28. The nuclei are close together 
and have increased greatly in size. Magnification, 840. 
