SEASONAL VARIATION IN THE DESCENT OF THE TESTES 
126 TO 450 DAYS OF AGE 
NUMBER OF 
OBSERVATIONS 
42 34 25 
40 
35 
59 92 94 
Table 39A. — Places oj capture oj rats born during 1948 
Place of birth 
South Alley Burrow and Area I 
North Alley Burrow and Area III 
Sex 
Total 
captures 
Proportion of total captures by place of capture 
South 
Alley 
Burrow 
Area 
I 
Area 
II 
North 
Alley 
Burrow 
Area 
III 
Area 
IV 
Male 
328 
0. 32 
0. 16 
0. 05 
0. 09 
0. 05 
0. 32 
Female 
204 
. 41 
. 24 
. 06 
.04 
. 07 
. 18 
Male 
192 
. 07 
.02 
.08 
. 40 
. 33 
. 10 
Female 
270 
. 04 
. 06 
. 16 
. 23 
. 34 
. 17 
162 
