284 Birge—The Crustacea of the Plankton. 
Table II.— Showing the number of Cyclops caught by the net at the 
same date and place in a series of six hauls of 3 m. each , and in a 
single haul of 18 m. 
Date. 
Sum of 
series. 
Single 
haul. 
Date. 
Sum of 
series. 
Single 
haul. 
1895. 
1895. 
400 
460 
May 16. 
11,940 
14,300 
Jan.9. 
378 
550 
17,530 
505 
600 
May 18. 
19,470 
19,200 
800 
May 20. 
11,780 
16,000 
Feb. 15. 
870 
1,220 
May 22. 
12,850 
11,240 
900 
May 27. 
16,710 
15,625 
Feb. 23. 
2,350 
1,180 
May 30... 
16,220 
17,900 
1,430 
June 1. 
13,220 
15,200 
Mch. 6. 
345 
620 
•Tuna 3. 
10,010 
10,080 
Mch, 7. 
678 
859 
.Tuna 10. 
8,020 
7,800 
Mch. 12.. 
719 
844 
.Tnnft 12. 
8,070 
3 640 
Mch. 23. 
780 
1,355 
June 17. 
4,530 
5,600 
Apr. 12. 
690 
710 
•Tuna 18. 
3,809 
3,240 
880 
5,680 
Apr. 15. 
1,000 
600 
Jnnft 22. 
4,760 
3,750 
Apr. 18. 
2,520 
1,290 
June 24. 
3,710 
2,120 
Apr 23. 
2,925 
3,550 
•Tnna 29 ... 
3,299 
2,400 
Apr. 30. 
9,055 
9,510 
July 1... 
3,190 
3,700 
6,960 
3,600 
7,620 
July 4. 
3,920 
3,300 
5,250 
July 6. 
6,105 
3,960 
May 4. 
15,470 
15,450 
July 9. 
3,416 
2,560 
May 7. 
13,630 
18,200 
July 11. 
2,960 
3,080 
May 12. 
11,980 
19,680 
July 19. 
3,434 
3,120 
July 24. 
2,791 
1,840 
of July. The comparisons of net and tube show no appreciable 
difference in coefficient between the catches of October when the 
vegetable plankton is at its maximum, and those of February 
and May, when it is greatly reduced in quantity. There is 
therefore no reason to suppose that the coefficient of the dredge 
is appreciably altered by being raised through the distance 
of three meters. It may be added that results similar to those 
obtained in the above table would be shown if any other species 
