PLATE 9 
EXPLANATION OF FIGURES 
68 Portion of large spermatocyte nucleus. 
67 to 76 Ring tetrads of first-year larval spermatocytes. Note the large 
open rings and especially the size of certain of the tratrads. In adult frogs the 
tetrads on the spindle are not in the form of open rings of this type, but resemble 
dumbbells and are very much smaller in size. Compare with plate 15. 
318 
