General Distribution of the Crustacea. 
445 
Table D—Aug. 1-4— Period IV—12 Series. 
Depth. 
Biaptomus. 
Cyclops. 
D. hyalinci 
D.pulicaria. 
Total. 
Meters. 
No. 
Per ct. 
No. 
Per ct. 
No. 
Per ct. 
No. 
Per ct. 
No. 
Per ct. 
0-^. 
1560 
57.5 
1038 
38.2 
113 
4.1 
0 
0 
2711 
43.4 
3—6. 
919 
53.4 
730 
42 4 
69 
4 
0 
0 
1718 
27.3 
6—9...... 
715 
52.8 
570 
42.1 
62 
4.5 
5 
.4 
1352 
21.6 
9-12. 
224 
50.9 
187 
42.5 
16 
3 6 
13 
2.9 
440 
7 
12—15. 
5 
63 
3 
37 
0 
0 
0 
0 
8 
.1 
15—18. 
5 
55 
3 
33 
1 
11 
0 
0 
9 
.1 
Total.i 
l 3428 
53.3 
2531 
40.5 
261 
4.2 
18 
.3 
6238 
Table E— Average catch and percentage for month . 
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 . 
2229 
70 
863 
27 
94 
3 
2 
.06 
3188 
48.6 
3-6. 
1257 
65 
612 
31 
66 
3.4 
6 
.3 
1941 
29.9 
6-9. 
592 
59 
329 
32 
46 
4.6 
37 
3.7 
1004 
15.3 
9—12. 
133 
36.5 
176 
48.3 
13 
3.5 
42 
11.5 
364 
5.4 
12—15. . .. 
6 
11.5 
28 
53.8 
2 
4 
16 
30.7 
52 
.8 
15-18. 
4 
57 
2 
30 
1 
13 
0 
0 
7 
.1 
Total ... .. 
4221 
64 
2010 
30.5 
222 
3.3 
103 
1.5 
6656 
The facts of this table are shown in PI. VIII, figs. 2-8. 
Table F —Percentage of total catch found at each level. 
Depth. 
Period. 
Meters. 
I. 
II. 
III. 
IV. 
Av. 
0-3. 
45.7 
57.6 
43 
41.7 
48.6 
3—6. 
29 5 
26.9 
34.8 
34.5 
29.9 
6-9. .. ... 
16.9 
10.6 
15.7 
17.0 
15.3 
9—12.. 
5.5 
3.7 
5.7 
6.2 
5.4 
12—15. 
1.9 
1 
.7 
.6 
.8 
15-18 . 
.5 
.1 
.02 
.03 
.1 
