PLANKTON OF THE GULF OF MAINE 
303 
Percentages of the several species of copepodsin samples from the surface hauls, February to May, 1920, 
identified and tabulated by Dr. C. B. Wilson 
Station number 
20044 
20045 
20046 
20047 
20048 
20049 
20053 
20056 
20058 
20059 
20000 
20061 
20003 
20064 
Month. 
February 
March 
Day of month.. 
22 
22 
22 
23 
23 
23 
1 
3 
4 
4 
4 
5 
11 
11 
SURFACE NE1 
25 
T. 
20 
Acartia longiremis- 
T. 
10 
4 
T. 
Oalanus finmarchicus- 
66 
50 
80 
75 
34 
90 
60 
70 
66 
95 
50 
60 
10 
45 
T. 
T. 
10 
10 
4 
5 
-T, 
4 
T. 
20 
25 
33 
-5 
-15 
6 
T. 
Pseudocalanus elongatus. 
34 
30 
20 
33 
- 5 
30 
22 
17 
10 
20 
66 
45 
3 
17 
Development stages. 
A. 
A 
A. 
C. 
A. 
c. 
F. 
’ C. 
Station number 
20065 
20067 
20070 |20071 
, V .V.l t' 
20072 
20073 
20075 
20077 
20079 
20081 
20083 
20084 
20087 
20088 
Month 
March — Continued 
Day of month . .. 
00101 1 
11 
12 
13 
13 
13 
17 
19 
19 
22 
22 
23 
23 
24 
24 
SURFACE NET 
Acartia clausi 
25 
5 
30 
10 
5 
75 
60 
T. 
T. 
30 
3 
30 
5 
5 
65 
5 
6 
T. 
T. 
50 
25 
25 
10 
6 
60 
15 
65 
25 
25 
15 
5 
10 
5 
Acartia longiremis 
Calanus finmarchi 
Calanus hyperbore 
Euchaeta norvegics 
Halithalestris cron 
Metridia lonea 
US 
5 
T. 
2 
,'r 1 

1 
2 
5 
1 

5 
8 
10 
5 
10 
5 
5 
3 
15 
6 
2 
6 
Metridia lucens. 
20 
1 
25 
Monstrilla serricor 
Paracalanus parvu 
Pseudocalanus elo 
Temora longicorni 
Development stag 
nis 
T. 
s 
5 
1 
2 
10 
agatus 
5 
2 
25 
T. 
10 
20 
33 
30 
33 
4 
T. 
15 
8 
10 
A. 

3S 
C. 
C. 
A. 
C. 
Station number... 
20089 
20090 
20091 
20092 
20093 ^ 20094 
20096 
20099 
20100 
20101 
20104 
20105 
20106 
20107 
20108 
Month 
April 
Day of month.. . 
6 
6 
9 
9 
9 
10 
10 
12 
12 
12 
15 
15 
16 
16 
16 
SURFACE NET 
Acartia ciausi... 
15 
5 
70 
1 
1 
97 
1 
1 
1 
95 
1 
40 
5 
45 
2 
12 
6 
50 
65 
10 
10 
20 
3 
50 
7 
1 
1 
65 
30 
70 
5 
5 
45 
40 
10 
3 
Acartia longiremis 
Calanus finmarchi 
Calanus hyperbore 
Halithalestris cron 
Metridia lonea... 
cus 
98 
50 
1 
55 
1 
98 
2 
100 
US 

1 
20 
10 
T. 
1 
25 
12 
16 
14 
1 
1 
6 
2 
15 
5 
1 
1 
T. 
1 
Metridia lucens .. 
10 
10 
Monstrilla serricor 
Pseudocalanus eloi 
nis 
igatus 
10 
2 
12 
2 
5 
20 
Temora longicorni 
2 
2 
