NATURAL HISTORY OF THE BAY SCALLOP 
611 
Table 6. — - Average lengths ( millimeters ) of scallops of certain year classes according to collections made 
at Pivers Island. (See fig. 26) 
Date 
1926 year 
class 
Date 
1926 year 
class 
Date 
1927 year 
class 
1926 
1927 
1927 
Oct. 17 
9 
May 19 
41 
May 19 ... 
Oct. 30 
9 
June3 
45 
June 3 
3 
Nov. 17 
10 
June 25. 
52 
June 25 
7 
9 
July 8 
54 
July 8 ... 
3 
Dec. 15 
8 
July 23 
59 
July 23... 
6 
Aug. 2 
60 
Aug. 2 
5 
1927 
Aug. 22 
61 
Aug. 22_. 
6 
Jan. 17 
5 
Sept. 6 
64 
Sept. 6 
6 
Feb. 1 
11 
Sept. 20.. . 
65 
Sept. 20... 
5 
12 
Oct. 11 
65 
Oct. 11 
3 
28 
Nov. 9 
69 
Nov. 9_. 
2 
27 
Dee. 23 
70 
Dec. 23 
5 
Apr. 4 
21 
Apr. 18 
25 
1928 
192S 
36 
Jan. 25 ... ... 
Jan. 25__ . 
Table 7. — Length frequencies of scallops collected at Pivers Island, October 17, 1926, to January 25, 
1928. (See fig. 26) 
1926 
1927 
1928 
Length 
No- 
De- 
Feb- 
Sep- 
Oc- 
No- 
De- 
milli- 
October 
vem- 
cem- 
ru- 
March 
April 
May 
June 
July 
August 
tern- 
to- 
vem- 
cem- 
Jan- 
meters 
ber 
ber 
ary 
ber 
ber 
ber 
ber 
uary 
17 
30 
17 
1 
15 
17 
i 
19 
5 
20 
4 
18 
4 
19 
3 
25 
8 
23 
2 
22 
6 
20 
11 
9 
23 
25 
12 
18 
119 
96 
13 
1 
1 
5 
24 
173 
20 
172 
244 
i 33 
2 
21 
42 
45 
44 
79 
2 
2 
1 
1 
3 
19 
31 
17 
55 
45 
1 33 
40 
2 6 to 3 5 
4 
7 
5 
45 
71 
122 
90 
138 
24 
12 
1 
2 
1 
2 
2 
5 
22 
21 
78 
53 
67 
30 
4 to 4 5 
2 
21 
13 
23 
31 
27 
26 
60 
14 
13 
12 
2 
2 
1 
9 
6 
18 
59 
10 
31 
46 
18 
9 
13 
12 
24 
25 
20 
11 
16 
7 
13 
9 
7 
1 
2 
5 
8 
12 
7 
30 
14 
6 to 6 5 
21 
12 
10 
22 
22 
11 
6 
14 
7 
9 
17 
8 
3 
4 
23 
20 
3 
16 
18 
7 to 7 5 
25 
5 
7 
13 
12 
10 
6 
6 
2 
7 
11 
6 
1 
1 
4 
10 
6 
5 
4 
3 
8 to 8.5 
26 
16 
5 
9 
21 
8 
7 
5 
3 
8 
13 
8 
1 
1 
3 
5 
19 
7 
4 
6 
10 
9 to 9 5 
13 
13 
6 
14 
9 
7 
6 
5 
2 
2 
3 
12 
2 
2 
1 
i 
i 
3 
6 
3 
2 
7 
10 
11 
15 
1 
13 
16 
2 
4 
1 
1 
7 
5 
7 
1 
1 
4 
i 
6 
7 
1 
7 
14 
11 
3 
6 
3 
11 
5 
5 
4 
2 
1 
1 
3 
5 
1 
i 
4 
1 
2 
9 
1 
2 
10 
12 
2 
4 
6 
21 
3 
5 
4 
1 
1 
5 
6 
4 
5 
5 
8 
3 
1 
6 
10 
13 
5 
4 
6 
7 
2 
4 
2 
2 
4 
3 
3 
2 
i 
3 
3 
2 
3 
8 
14 
1 
6 
4 
10 
3 
3 
4 
7 
I 
2 
4 
7 
5 
2 
1 
2 
7 
5 
1 
1 
15 
2 
3 
5 
3 
8 
3 
2 
1 
5 
4 
8 
1 
4 
1 
2 1 
16 
4 
2 
3 
8 
12 
1 
3 
3 
3 
3 
7 
3 
1 
1 
1 
g 
17 
4 
2 
2 
5 
2 
2 
1 
3 
3 
1 
2 
1 
2 
1 
1 
2 
2 
18 
2 
1 
1 
8 
1 
2 
7 
5 
i 
4 
6 
3 
5 
2 
1 
2 
3 
19 
1 
2 
3 
3 
4 
1 
1 
1 
2 
5 
4 
2 
1 
2 
1 
20 
3 
2 
1 
2 
i 
1 
2 
2 
3 
2 
2 
3 
1 
1 
1 
2 
4 
21 
2 
1 
i 
3 
2 
i 
2 
1 
1 
2 
i 
1 
22 
1 
5 
5 
1 
3 
i 
i 
3 
7 
7 
2 
1 
3 
23 
1 
2 
4 
1 
2 
2 
2 
2 
4 
1 
24 
4 
5 
1 
1 
1 
2 
l 
5 
4 
2 
1 
i 
1 
1 
1 
25 
1 
4 
3 
1 
2 
i 
2 
1 
1 
1 
26 
3 
3 
2 
3 
4 
l 
1 
4 
2 
1 
27 
1 
1 
2 
1 
2 
4 
1 
3 
3 
3 
i 
i 
1 
28 
1 
1 
1 
4 
5 
2 
1 
2 
4 
2 
1 
29 
1 
2 
2 
1 
4 
3 
1 
4 
5 
30 
1 
1 
5 
2 
4 
2 
1 
4 
2 
6 
1 
31 
i 
1 
3 
3 
3 
2 
2 
1 
3 
32 
2 
1 
9 
2 
5 
3 
1 
1 
2 
i 
4 
33 . 
2 
1 
1 
7 
3 
1 
3 
2 
2 
5 
1 
34 . 
1 
1 
2 
15 
6 
8 
4 
2 
2 
3 
5 
35 
4 
3 
2 
2 
1 
1 
1 
6 
36 . 
2 
1 
4 
1 
12 
6 
1 
2 
1 
2 
6 
1 
37 
1 
1 
7 
1 
11 
7 
2 
5 
1 
4 
1 
38 
1 
2 
1 
3 
5 
15 
6 
2 
2 
3 
3 
1 
1 
39 . 
2 
1 
1 
7 
9 
6 
1 
2 
5 
5 
2 
1 
1 
40 
1 
1 
3 
2 
8 
10 
7 
4 
1 
2 
3 
3 
1 
41 _ 
1 
1 
1 
5 
8 
1 
2 
8 
5 
6 
42 
1 
2 
4 
2 
7 
11 
6 
5 
6 
4 
9 
43 
5 
2 
5 
6 
4 
4 
4 
3 
7 
8 
44 
2 
4 
2 
6 
9 
3 
7 
7 
12 
4 
8 
2 
1 
45 
i 
3 
3 
4 
4 
3 
5 
1 
2 
3 
5 
1 
46 
i 
2 
2 
3 
2 
3 
5 
2 
6 
5 
6 
5 
47 
1 
1 
5 
4 
4 
3 
4 
2 
4 
2 
7 
2 
48 . 
1 
i 
2 
6 
6 
3 
3 
6 
6 
5 
3 
9 
1 
1 
49 
I 
2 
2 
10 
2 
1 
3 
4 
4 
3 
4 
50 
1 
1 
1 
2 
1 
4 
7 1 8 
9 
8 
7 
6 
2 
i These data recorded as 2 millimeters or under (66) arbitrarily divided as into equal portions, 
