62 
BULLETIN OP THE BUREAU OF FISHERIES 
Table 29. — Rate of growth of the brood of 1917 
When measured 
Close confinement 
Wide range 
Number 
Smallest 
Largest 
Females 
125 mm. 
or more 
in length 
Average 
length 
Number 
Smallest 
Largest 
Females 
125 mm. 
or more 
in length 
Average 
length 
Aim. 
Mm. 
Mm. 
Aim. 
Aim. 
Aim. 
May 19, 1919 
100 
50 
84 
60. 1 
100 
46 
72 
52. 5 
Oct 23,' 1919 
98 
51 
101 
66.7 
81 
50 
81 
60. 9 
Oct. 5, 1920 
1 50 
58 
109 
74.8 
i 63 
57 
96 
70. 6 
Sept. 24, 1921 _ 
50 
68 
127 
1 
89. 5 
58 
61 
109 
81. 1 
Sept. IS, 1922 
77 
135 
3 
97.8 
51 
81 
121 
96. 3 
Oct. 5, 1923 
53 
84 
141 
10 
107.9 
48 
82 
135 
1 
100.4 
Sept. 11, 1924 
50 
86 
141 
15 
112. 1 
44 
83 
139 
1 
101.7 
Oct. 20, 1925 
53 
2 82 
144 
19 
117.0 
41 
85 
2 130 
2 
102/3 
Sept. 30, 1926 
50 
91 
152 
32 
123.8 
39 
85 
147 
13 
118.0 
Oct. 15, 1927 
3 50 
89 
154 
37 
134.8 
4 39 
87 
150 
31 
126.4 
1 Rats destroyed many of the animals in this lot. Others probably were not found when measurements were taken. 
2 The apparent decrease in size probably is brought about measuring different terrapins, as all the animals in any 1 pen 
seldom are found. 
3 This lot contained 10 males, but the measurements for them were not kept separate and can not be given. 
4 This lot contained 7 males, but the measurements for them were not kept separate and can not be given. 
Table 30. — Rate of growth of the offspring of the wild and domestic brood stock of the 1919 brood 
When measured 
Offspring of wild brood stock 
Offspring of domestic brood stock 
Number 
Smallest 
Largest 
Females 
125 mm. 
or more 
in length 
Average 
length 
Number 
Smallest 
Largest 
Females 
125 mm. 
or more 
in length 
Average 
length 
Aim. 
Aim. 
Aim. 
Aim. 
Aim. 
Aim. 
May 11, 1920 
4 73 
30 
55 
38.2 
i 85 
23 
48 
35.7 
Do' 
2 85 
26 
46 
34. 1 
2 84 
26 
54 
34. 2 
May 13, 1920. __ 
a 100 
37 
55 
38.4 
4 100 
33 
48 
40. 2 
Sept. 30, 1921... 
54 
36 
71 
51.8 
90 
41 
82 
62. 0 
Sept. 19, 1922 . . 
47 
49 
96 
70. 7 
87 
46 
110 
77. 4 
Oct. 10, 1923 
81 
53 
117 
87. 6 
Oct. 8, 1924 
46 
75 
114 
91.3 
78 
69 
123 
90. 2 
Oct. 27, 1925 
44 
78 
123 
96.0 
78 
75 
132 
4 
95. 3 
Oct. 8, 1926 
41 
83 
135 
101.0 
78 
75 
139 
14 
104. 7 
Sept. 28, 1927: 
22 
74 
98 
/ 90. 4 
Females _ 
52 
87 
144 
1 26 
l 119.3 
1 This lot, which originally consisted of 100 terrapins, was fed on oysters during the winter of 1919-20. 
2 This lot, which originally consisted of 100 terrapins, was fed on fresh fish during the winter of 1919-20. 
3 This lot was selected on May 13, 1920, from the 2 lots listed above, and it originally consisted of 100 terrapins, some of 
which were destroyed by rats. All subsequent measurements were based upon the surviving ones of this lot. 
* This lot was selected from the 2 lots listed under the preceding date. All subsequent measurements were based upon the 
surviving ones of this lot. 
Table 31. — Rate of growth of hybrid terrapins of the brood of 1919 
When measured 
Texas males and Carolina females 
Carolina males and Texas females 
Number 
Smallest 
Largest 
Females 
125 mm. 
or more 
in length 
Average 
length 
Number 
Smallest 
Largest 
Females 
125 mm. 
or more 
in length 
Average 
length 
Aim. 
Aim. 
Aim. 
Aim. 
Aim. 
. 
Aim. 
May 11, 1920 - 
i 48 
25 
52 
35.6 
1 96 
26 
47 
33. 4 
Do __ 
2 50 
26 
48 
34.0 
2 96 
27 
49 
32.9 
May 12, 1920 
3 80 
28 
52 
35.7 
3 100 
29 
49 
35. 5 
Sept. 24, 1921 
4 54 
33 
90 
63.0 
4 30 
43 
93 
58.3 
Sept. 14, 1922 
53 
42 
107 
78.0 
31 
5 41 
« 92 
62.3 
Oct. 10, 1923 
54 
55 
120 
86. 1 
31 
65 
119 
83.1 
Oct. 9, 1924_ 
53 
3 52 
124 
89.2 
31 
74 
127 
2 
92.8 
Oct. 22, 1925 
49 
61 
135 
3 
95.5 
30 
J 72 
130 
i 
94.2 
Oct. 2, 1926- 
51 
72 
144 
7 
98.3 
30 
72 
143 
4 
102.6 
Sept. 28, 1927 : 
Males 
33 
86 
104 
/ 98.3 
18 
81 
108 
\ o 
/ 91.8 
Females. 
19 
81 
148 
/ 10 
\ 125. 3 
13 
92 
150 
/ 8 
\ 127. 0 
1 This lot was fed on oysters during the winter of 1919-20. 
2 This lot was fed on fish during the winter of 1919-20. 
3 This lot was selected on May 12, 1920, from the 2 lots listed under the preceding date. All subsequent measurements were 
based upon the surviving ones of this date. 
4 Many terrapins were destroyed by rats. 
3 The apparent decrease in size may be accounted for by closer measurements or by the fact that the same terrapins are not 
measured each year, as all the terrapins in a pen often are not found. 
