Kixg. — Cytology of Araiospora. 
9 
Explanation of Plates. 
All drawings were outlined with the aid of a camera lucida; in most cases 
a Bausch and Lomb no. 1 eye-piece and T \ objective were used. In all cases, 
however, other magnifications were employed in putting in details. The 
figures are magnified as follows:—fig. 1, 485; fig. 4, 1000; fig. 22a, 1400; 
fig. 22b, 1400 ; and fig. 22c, 2440. All others are magnified 1290 times, except 
the figures in plate 15. 
PLATE 11. 
Fig. 1. Portion of the upper part of a young basal cell, showing arrangement 
of nuclei and cytoplasm. 
Fig. 2. Tangential section of young basal cell more highly magnified. 
Fig. 8. Longitudinal section of young zoosporangium showing structure of 
cytoplasm and arrangement of nuclei. Its manner of attachment 
is shown at the base. 
Fig. 4-6. Method of zoospore formation. In figures 4 and 6 there are no 
vacuoles present. 
Fig. 7-8. Zoospores. 
Fig. 9. Young oogonium into which nuclei are migrating. 
Fig. 10. Recently formed oogonium. Most of the nuclei have taken periph¬ 
eral positions. 
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