232 
PACIFIC SCIENCE, Vol XXI, April 1967 
TABLE 1 
Frequency Distribution of Diameter in Millimeters of A. placenta (Original Data) 
DIAMETER 
(in mm) 
NUMBER 
OF SPECIMENS 
MAR. 
25 
MAY 
21 
JUNE 
15 
JULY 
17 
AUG. 
15 
OCT. 
5 
CCT. 
22 
NOV. 
21 
DEC. 
12 
JAN. 
16 
FEB. 
12 
7 
5 
8 
1 
1 
1 
7 
9 
4 
1 
1 
10 
1 
1 
2 
2 
3 
3 
11 
1 
1 
11 
7 
5 
1 
1 
7 
12 
1 
1 
4 
11 
8 
8 
1 
2 
13 
6 
3 
6 
25 
13 
15 
1 
6 
14 
3 
9 
2 
33 
15 
25 
4 
15 
10 
10 
8 
51 
30 
35 
3 
7 
6 
16 
2 
13 
5 
60 
35 
31 
3 
1 
3 
13 
10 
17 
17 
17 
10 
65 
60 
36 
6 
10 
2 
12 
9 
18 
26 
22 
30 
63 
55 
40 
8 
20 
9 
29 
22 
19 
34 
22 
25 
55 
45 
27 
21 
24 
20 
33 
25 
20 
33 
22 
30 
43 
68 
27 
23 
53 
37 
24 
11 
21 
35 
22 
31 
45 
38 
16 
33 
50 
50 
31 
19 
22 
41 
25 
24 
47 
36 
12 
35 
45 
49 
28 
24 
23 
31 
26 
29 
33 
24 
11 
31 
43 
45 
25 
17 
24 
33 
23 
18 
34 
24 
13 
22 
24 
45 
18 
10 
25 
26 
25 
14 
47 
15 
9 
21 
25 
28 
14 
24 
26 
21 
17 
11 
34 
13 
4 
11 
20 
11 
26 
23 
27 
8 
15 
10 
20 
9 
2 
11 
11 
14 
23 
9 
28 
17 
15 
16 
14 
6 
5 
10 
13 
12 
8 
5 
29 
7 
10 
16 
13 
10 
2 
7 
7 
12 
5 
4 
30 
4 
6 
5 
5 
2 
2 
2 
2 
4 
2 
3 
31 
3 
4 
1 
2 
1 
4 
2 
1 
1 
4 
3 
32 
6 
5 
2 
2 
4 
3 
2 
3 
4 
33 
2 
1 
5 
4 
2 
1 
2 
3 
34 
1 
1 
1 
1 
2 
35 
1 
1 
1 
36 
2 
1 
