VARIATION IN ECHINOID PLUTEI 
III. Right Oral Arm, 3 Days 
7 
ft 
9 
10 
11 
12 
13 
14 
15 
16 
17 
18 
1Q 
Xa 
g 
o 
Q 
V 
0 
in 
2 
1 
3 
w 
2 
o 
19 
o 
1 
X 
o 
1 
X 
D 
13 
1 
1 
14 
2 
3 
5 
15 
2 
2 
2 
3 
1 
1 
11 
16 
1 
1 
6 
3 
1 
1 
3 
16 
17 
2 
3 
4 
2 
1 
1 
13 
18 
1 
2 
2 
3 
1 
3 
1 
13 
19 
1 
4 
2 
1 
1 
1 
10 
20 
1 
2 
1 
2 
1 
2 
9 
21 
1 
1 
1 
3 
22 
1 
l! 
1 
3 
23 
1 
1 
2 
4 
2 
18 
15 
14 
15 
6 
9 
2 
4 
3 
1 
2 
///. Le/i Oral Arm, 3 Days 
7 
8 
9 
10 
11 
12 
13 
14 
15 
16 
17 
18 
19 
20 
1 
1 
I 
0 
10 
1 
1 
1 
3 
11 
3 
2 
1 
6 
12 
2 
2 
1 
5 
13 
1 
2 
1 
4 
14 
1 
2 
1 
1 
5 
15 
1 
1 
5 
2 
1 
10 
16 
1 
1 
6 
2 
1 
1 
3 
1 
16 
17 
2 
2 
3 
2 
1 
10 
18 
1 
2 
2 
3 
1 
3 
1 
13 
19 
4 
1 
1 
1 
1 
9 
20 
1 
1 
3 
; 
2 
1 
1 
10 
21 
1 
1 
1 
3 
22 
1 
1 
2 
4 
23 
1 
1 
4 
2 
17 
17 
18 
10 
6 
10 
1 
5 
2 
1 
