NUMBER OF OVA: ALBINO RAT 
4. On the number of ova and the body length 
425, 
I have arranged the number of ova according to the body 
length of the rats, and the results are given in table 8. Graphs 
TABLE 6 
The relation between the body weights and total number of ova in both ovaries; average 
From this table the pregnant rats were omitted 
number. 
NUM- 
BER 
OF 
RATS 
WoRrRWNWNwWW NPR 
Re 0 th HH bo 
A 7 OF co | 
gopy werent|werenr| BOTH |g BS he 
RIES Ss = ‘a es es = g 3 
SRS ee meee lee eee“) aad oe 
Rats without corpora lutea 
grams grams | mgm. 
5.5 35,105 35,105 
too 27,870 | 382 28,252 
10.6 24,608 | 978 25,586 
13.9-14.8 | 14.3) 2.0 | 17,417| 758 | 20 18,195 
20.5-23.7 | 22.1) 4.4 | 12,587 | 437 | 396 | 56 | 13,476 
30.2-34.9 | 33.3 7.7 | 10,105 | 251. | 202.) 113 |.10,671 
50.0-58.2 | 54.1} 8.9 | 10,118] 194 | 98] 75 | 10,485 
61.9-69.5 | 64.7) 11.9 | 9,812} 191 | 114 | 72 | 10,189 
74.8-78.3 | 76.5} 10.6 | 8,545) 183 | 81 | 45 | 8;854 
93.5-98.5 | 95.4) 13.8 | 8,522) 167 | 92) 56 | 8,837 
Rats with corpora lutea 
97 .8-106.3) 102.0) 32.0 | 6,549] 165 | 71 Geer 12) 15) 27 
113 .5-129.5| 122.8} 33.8 | 9,031 | 260 | 131 9,473; 10} 14| 24 
138 .7-145.0} 142.1} 46.9 | 3,490| 150 | 83] 30] 3,753| 54] 29] 88 
155.0-167.1| 161.1] 53.6 | 5,640] 218 | 94] 31] 5,983| 39}; 20| 59 
238.0} 65.2 | 1,709] 128 | 61) 21] 1,919} 90| 18] 108 
have been made for these data also, but they show relations which 
in all respects are so similar to those obtained when the data are 
It is to be 
noted that when rats reach a body length of 148 mm. ovulation 
occurs almost invariably, as shown in tables 2 and 8, and I shall 
plotted on body weight that they are now omitted. 
take up this point in the discussion. 
THE AMERICAN JOURNAL OF ANATOMY, VOL. 27, No. 4 
