444 Birge—Vertical Distribution of Pelagic Crustacea. 
Table A— July 7-14 —Period I —9 Series. 
Depth. 
Diaptomus. 
Cyclops. 
D. hyalina. 
D. pulicaria. 
Total. 
Meters. 
No. 
Per ct. 
No. 
Per ct. 
No. 
Per ct. 
No. 
Per ct. 
No. 
Per ct. 
0-3. 
1860 
84.01 
234 
10 57 
119 
5 37 
1 
.05 
2214 
45.68 
3—6. 
1201 
83.87 
154 
10.75 
73 
5.09 
4 
.28 
1432 
29.54 
6—9. 
593 
72.32 
137 
16.71 
63 
7.68 
27 
3 29 
820 
16 92 
9-12. 
120 
44.78 
71 
26.49, 
44 
16.42 
33 
12.31 
268 
5.53 
12-15. 
IS 
20.00 
28 
8i.ii 
10 
11.11 
34 
37.78 
90 
1.86 
15—18. 
16 
69 56 
2 
8.70 
3 
13.03 
2 
8.70 
23 
.48 
Total. 
3808 j 
j 78.56 
626 
12.92 
312 
6 44 
101 
2.08 
4847 
Table B— July 16-19— Period II—24 Series. 
Depth. 
J Diaptomus. 
Cyclops. 
D. hyalina. 
D. pulicaria. 
Total. 
Meters. 
No. 
Per ct. 
No. 
j Per ct. 
No. 
Per ct. 
j No. 
Per ct. 
No. 
Per ct. 
0—3. 
2675 
75.6 
798 
22 5 
61 
1.7 
3 
.08 
3537 
57.6 
3—6. 
1133 
68.5 
463 
28 
47 
2.9 
9 
.5 
1652 
26.9 
6—9.... . 
384 
57 
201 
30.6 
31 
5 
39 
6 
655 
10.6 
9—12. 
53 
22.9 
114 
49.4 
5 
2.1 
59 
25.5 
231 
8.7 
12-15.. _ 
3 
2 
34 
54 
1 
o 
25 
39 
63 
1 
15—18. 
5 
83 
1 
17 
0 
0 
0 
0 
6 
.1 
Total. 
4253 
69 3 
1611 
26.2 
145 
2.3 
185 
2 
6144 
Table C—July 27-29— Period III—14 Series. 
Depth. 
Diaptomus. 
Cyclops. 
D. hyalina. 
! D. pulicaria. 
Total. 
Meters. 
No. 
Per ct. 
No. 
Per ct. 
No. 
Per ct. 
No 
Per ct. 
I No. 
Per ct. 
0-3. . 
2271 
62.68 
1229 
33.92 
123 
3.4 
0 
.0 
| 3623 
41.75 
3—6. 
1831 
61.24 
1059 
35.42 
95 
3.17 
5 
.17 
2990 
34.45 
6-9. 
881 
59.72 
475 
32.20 
49 
3 32 
70 
4.75 
1475 
17.00 
9—12. 
156 
28.89 
332 
61.48 
4 
.74 
48 
8.89 
540 
6.22 
12—15. 
3 
6 25 
40 
83.33 
3 
6.25 
2 
4.17 
48 
.55 
15-18. 
1 
33.33 
2 
66.67 
0 
.00 
0 
.00 
3 
.03 
Total. 
5143 
59.26 
3137 
36.15 
274 
3.15 
125 
1.44 
( 8679- 
