Statistics of Diaptomus. 
453 
Period II—July 16-19—24 Series (15 Day, 9 Night). 
Depth. 
Average. 
Day. 
Night. 
Meters. 
No. 
Per cent. 
No. 
Per cent. 
No. 
Per cent. 
0—3. .. ........ 
2675 
62.9 
3136 
68.41 
1915 
51.75 
3—6.. 
1133 
26.6 
1198 
26.13 
1021 
27.69 
6-9.. 
384 
9. 
222 
4.84 
652 
17.60 
9—12 .. 
53 
1 2 
18 
.39 
99 
2.68 
12—15........ 
3 
.08 
4 
.08 
3 
.08 
15-18 .... .. . 
5 
.13 
6 
.13 
5 
.13 
Total .. 
4253 
4584 
3698 
Period III—July 27-29—14 Series (7 Day, 7 Night). 
Depth. 
Average. 
Day. 
Night. 
Meters. 
No. 
Per cent. 
No. 
Per cent. 
No. 
Per cent. 
0-3.. 
2271 
44.16 
2706 
47.49 
1836 
39.64 
3—6. ....... ... 
1831 
35 60 
2169 
38.06 
1544 
33.36 
6—9. ... .. 
881 
17.13 
690 
12.10 
1060 
22.90 
9—12.... 
156 
3.03 
127 
2.22 
186 
4.01 
12—15. 
3 
.06 
5 
.08 
1 
.02 
15—18. 
1 
.02 
1 
.01 
1 
.02 
5143 
5698 
4628 
Period IV—Aug. 2-4—12 Series (6 Day, 6 Night). 
Depth. 
Average. 
Day. 
Night. 
Meters. 
No. 
Per cent. 
No. 
Per cent. 
No. 
Per cent. 
0-3 .. 
1560 
45 51 
1805 • 
44.07 
1316 
47.61 
3—6.. 
919 
26.81 
1178 
28.76 
661 
23.95 
6—9........... . 
715 
20.86 
795 
15.34 
636 
23.01 
9—12.... ....... 
224 
6.53 
307 
7.49 
142 
5.13 
12—15......... e . 
5 
.15 
5 
.12 
5 
.18 
15—18.. 
5 
.15 
5 
.12 
5 
.18 
Total. 
3428 
4095 
j 2765 
