NUMBER OF OVA: ALBINO RAT 429 
arrangement in groups is for convenience merely, and they rep- 
resent in reality a continuous series. It follows from this that 
the groups of smallest diameter should be the first to appear and 
TABLE 10 
The relation between the weight of both ovaries and the number of ova; average number 
NUMBER OF 
NUMBER OF OVA 
WEIGHT CORPORA LUTEA 
NUM- 
INTERVAL OF 
BER BODY 
OF OVARY | BOTH iS 3 3 = 
OF WEIGHT oS a 
WEIGHT OVA- ro] S > La 
RATS ez + =) b=) = 
RIES =~. o = = = o 
n ° ° as 3 80 3 
nal ~ - ai ~~ = mB ~ 
oN = = os Ss) § 3 S 
= a a = Si Nn = cal 
Rats without corpora lutea 
mgm. mgm. grams 
1 0.6! 5.5] 35,105 35,105 
1 sex 7.3] 27,870 | 382 28,252 
1 3.31} 10.6) 24,608 | 978 25,586 
2 1.8-2.2 | 2.0 | 14.3) 17,417] 756 20 18,195 
2 | 2.4-5.6 | 4.0 | 27.4|.11,897| 311), 224 31 | 12,463 
2 | 6.46.7] 6.5 | 29.2/11,015; 341 | 189} 114 | 11,659 
3 | 7.48.8) 8.0 | 66.5) 8,958; 168 80 42 | 9,248 
3 | 9.4-10.4/10.0 | 73.6) 8,999} 174] 102 65 | 9,340 
3 {10.8-12.2/}11.5 | 67.8] 10,216] 265 | 153} 104 | 10,740 
2 |12.9-14.0/13.5 | 68.7) 9,760) 233 |- 110 70 | 10,173 
2 |14.0-18.9)16.5 | 81.9) 7,517} 166 95 51 | 7,829. 
Rats with corpora lutea 
2 |20.1-22.2) 21.2 | 111.4; 8,129) 155 64 46 | 8,394 9 9/18 
3 |31.1-33.8] 32.5 | 127.2) 7,508] 260 | 135 48 | 7,951| 31] 238 | 54 
3 136.5-41.6| 38.5 | 143.1] 5,802} 241 | 122 73 | 6,238; 40] 16] 56 
3 |43.8-49.2/ 47.3 | 124.8) 6,147] 189 94 AT | 6,477 | 27 | -23 | 50 
2 |54.8-58.1] 56.4 | 165.6) 5,125] 159 99 25 | 5,408| 33] 27 | 60 
2 |65.2-73.5] 69.4 | 199.0} 3,987] 129 85 66 | 4,267| 61) 16 | 77 
2 |73.5-82.6| 78.0 | 180.1) 4,449) 164 65 19 | 4,697] 26] 18 | 44 
1 Ovary weights were taken from ‘The Rat’ for the observed body weights. 
the other groups follow, in time of appearance, in the order of 
their size. 
Table 10 and chart 4 show that this is what occurs. Further, 
at the time of first appearance any group is represented by only 
a small number and the appearance of the next group coincides 
with the maximum number in the group just preceding. The 
