section. These samples were weighed to the nearest 0.001 gm. The eggs of the most mature 
group were counted and measured to the nearest 0.02 mm, The resulting measurements and 
weights are recorded in table 2, The measurements, coded by subtracting 60 and multiplying 
by 100, were treated with an analysis of variance test (table 3), Because of the lack of one 
sample, the analysis of variance for data based ona single classification with unequal subsample 
numbers (Snedecor 1946:240-241) was used. This test showed a significant difference (P < 0,05) 
in the diameter means between positions (A, B, and C) but none between sections. The means 
for positions A, B, and C were 0.9606 mm,., 0.9640 mm., and 0.9447 mm. respectively, 
Table 1,--Maximum, minimum, and random egg diameter measurements for a single 
ovary (no, 24) (in micrometer units of 7. 5p) 
Chance Maximum] Minimum = Chance | Maximum] Minimum 
diameter | diameter | diameter diameter| diameter | diameter 
The number of mature eggs to be expected from 0.5 grams of each sample was calculated 
and an analysis of variance was applied to these numbers to examine differences in the number 
of mature eggs per unit weight between sections and between positions, The test (table 4) showed 
that the mature eggs were evenly distributed throughout the ovary. 
In view of these results it was decided that sampling should be done in such a manner that 
the eggs would be randomly picked from a cross-section of the ovary. The sampling procedure 
described ina later section was therefore adopted. 
After the study was nearly complete, however, it was noticed that the eggs near the 
periphery of the ovary were always easier to tease apart than those towards the center because 
of a less compact arrangement of eggs in this region, This caused the homogeneity of the dia- 
meter variances between positions to be questioned, as the measuring technique used would 
cause the greater irregularity of egg shapes resulting from greater compactness to increase 
the variance in the center, Ina test of homogeneity (Snedecor 1946, p. 249) the variance of 
0.0035 for position A was found to differ significantly from those of positionsB and C, which were 
