PLANKTON OP THE GULF OF MAINE 297 
Percentages of the several species of copepods in vertical hauls, May to October, 1915, identified 
and tabulated by Dr. C. B. Wilson 
[In this and similar tables, T. = occasional specimen or trace; A. = abundant; C. = common; F. = few.] 
10266 
10267 
10269 
10270 
10271 
10272 
10278 
10279 
May 
4 
5 
6 
6 
7 
10 
14 
26 
125-0 
260-0 
115-0 
175-0 
70-0 
90-0 
150-0 
65-0 
VERTICAL NET 
5 
10 
10 
5 
14 
T. 
1 
2 
2 
T. 
70 
3 
90 
85 
1 
80 
5 
80 
5 
T. 
1 
1 
T. 
70 
1 
84 
5 
78 
3 
1 
T. 
T. 
2 
1 
1 
2 
2 
15 
3 
5 
5 
1 
2 
3 
2 
3 
T. 
2 
5 
5 
14 
1 
4 
5 
2 
A. 
3 
A. 
c. 
C. 
F. 
F. 
Total number of copepods per square meter >... 
511,000 
50, 000 
48, 000 
411, 500 
11, 000 
55, COO 
175, 000 
189, 000 
Station number 
10282 
10283 
10284 
10286 
10287 
10288 
10290 
10291 
10293 
10294 
10296 
10299 
Month 
June 
Day of month 
10 
10 
11 
14 
14 
19 
19 
23 
23 
23 
24 
26 
Depth in meters 
180-0 
180-0 
80-0 
80-0 
70-0 
200-0 
60-0 
70-0 
75-0 
170-0 
60-0 
200-0 
VERTICAL NET 
Acartia clausi 
15 
10 
2 
4 
25 
3 
50 
45 
5 
2 
2 
3 
Acartia longiremis 
1 
Calanus finmarchicus 
75 
50 
70 
80 
60 
80 
25 
20 
50 
58 
78 
40 
Calanus hyperboreus 
1 
10 
1 
6 
5 
6 
3 
10 
5 
5 
10 
15 
Centropages bradyi 
T. 
Dwightiagracilis 
T. 
Eu cal an us attenuatus 
T. 
Euchaeta media 
T. 
Euchseta norvegica _ 
1 
3 
3 
Halithalestris croni 
1 
Metis ignaea 
T. 
Metridia longa. _ _ „ 
10 
15 
3 
15 
10 
15 
25 
20 
Metridia lucens _ 
5 
3 
15 
Paracalanus parvus 
3 
10 
6 
4 
5 
2 
7 
5 
io 
5 
5 
3 
Pseudocalanus elongatus 
4 
5 
6 
6 
5 
3 
5 
3 
Tern ora longicornis 
10 
10 
2 
2 
T. 
Development stages 
A. 
F. 
F. 
S. 
Total number of copepods 
per square meter 1 
10, 000 
21,000 
2, 500 
11, 500 
35, 000 
55, 500 
21, 500 
15, 500 
20, 000 
65, 500 
9, 500 
43, 000 
* From Bigelow, 1917, p. 319. 
