36 
BULLETIN OF THE BUREAU OF FISHERIES 
Table 12. — Production and fertility of eggs of the 1912 brood 
Year 
Smallest (runts) of 
the entire brood se- 
lected at 1 year of 
age, in part fed the 
first winter and all 
the second winter. 
Males, 10; females, 
54 
Largest selected from 
entire brood at 1 
year of age, all fed 
first 2 winters. 
Males, 17; females, 
67 
Year 
Smallest (runts) of 
the entire brood se- 
lected at 1 year of 
age, in part fed the 
first winter and all 
the second winter. 
Males, 10; females, 
54 
Largest selected from 
entire brood at 1 
year of age, all fed 
first two winters. 
Males, 17; females, 
67 
Eggs 
• laid 
Young 
hatched 
Per 
cent 
fertile 
Eggs 
laid 
Young 
hatched 
Per 
cent 
fertile 
Eggs 
laid 
Young 
hatched 
Per 
cent 
fertile 
Eggs 
laid 
Young 
hatched 
Per 
cent 
fertile 
1919 
135 
102 
75.5 
124 
113 
91. 2 
1925 _ 
279 
247 
88.5 
116 
116 
100.0 
1920_ ... 
255 
226 
88.7 
189 
161 
85.2 
1926 
447 
395 
88.4 
255 
209 
82.0 
1921 _ 
228 
182 
79.9 
142 
130 
91.6 
1927 . 
461 
396 
85.9 
459 
392 
85.3 
1923 
416 
356 
85.6 
171 
167 
97! 7 
Total 
2, 907 
2, 480 
85.3 
1,953 
1, 750 
89.6 
1924 
336 
288 
85.8 
251 
235 
93.7 
Table 13. — Production and fertility of eggs of the 1913 brood, which were fed first winter. Males, 4l 
females, 75 
Year 
Eggs 
laid 
Young 
hatched 
Per cent 
fertile 
1920 
« 
31 
29 
93.1 
1921 
42 
35 
83.3 
1922 
146 
73 
50.4 
1923 
101 
88 
87.1 
1924 
118 
101 
83.2 
Year 
Eggs 
laid 
Young 
hatched 
Per cent 
fertile 
1925 
61 
41 
67.0 
1926 
115 
60 
49.0 
1927. 
234 
157 
67.0 
Total 
848 
584 
69.1 
Table 14. — Production and fertility of eggs of the 1914 brood, which were fed first winter. Males, 2; 
females, 83 
Year 
Eggs 
Young 
Per cent 
Year 
Eggs 
Young 
Per cent 
laid 
hatched 
fertile 
laid 
hatched 
fertile 
1920 
35 
35 
100.0 
1925 
61 
61 
100.0 
1921.. 
26 
12 
46.2 
1926 
140 
99 
71.0 
1922 . 
75 
34 
46.4 
1927 
371 
241 
64.9 
1923 
121 
147 
121 
147 
100.0 
mo 
1924... 
Total 
976 
750 
76.8 
Table 15. — -Production and fertility of eggs of the 1916 brood, which were fed first winter. Males, 40; 
females, 158 
Year 
Eggs 
Young 
Per cent 
Year 
Eggs 
Young 
Per cent 
laid 
hatched 
fertile 
laid 
hatched 
fertile 
1922 
2 
2 
100.0 
1926. 
133 
122 
91.8 
1923 
34 
34 
100.0 
1927.. 
219 
183 
83.6 
1924 
63 
52 
61 
44 
96.9 
84.6 
1925 . 
Total 
503 
446 
88.6 
RECORDS OF SURVIVAL 
During the entire course of the experiments no evident diseases have occurred 
among the terrapins after they had attained an age of about 1 or 2 years, and there- 
after the loss from this source has been negligible. A very considerable death rate, 
apparently due to disease, has occurred among the young. Further remarks con- 
