514 
Birge—The Crustacea of the Plankton. 
Table IV.—Continued. 
Diap- 
tomus. 
Cy¬ 
clops. 
D. puli- 
caria. 
D. hya- 
lina. 
D. 
retro- 
curva. 
Chy- 
dorus. 
HDiap- 
hano- 
soma. 
Total. 
1895. 
February 15-28.. 
28.0 
73.1 
a 
65.8 
a 
a 
a 
166.9 
March 1-15 .............. 
28.3 
55.7 
a 
34.7 
a 
a 
a 
118.7 
March 16-31 ............. 
34.7 
66.2 
a 
63.6 
a 
a 
a 
164.5 
April 1-15... 
U.O 
53.9 
a 
26.4 
a 
a 
a 
94.3 
April 16-30. 
20.6 
242.5 
a 
16.3 
a 
scat. 
a 
229.4 
May 1-15.......... 
34.4 
864.9 
a 
28.9 
ifr- 
a 
12.1 
a 
940.3 
May 16-31............ 
207,9 
944.4 
a 
250.7 
a 
16.5 
a 
1419.5 
June 1-15.. 
285.0 
616.9 
a 
319.2 
a 
36.7 
a 
1256.6 
June 16-30 .............. 
190 6 
262.6 
a 
135.6 
Scat. 
21.9 
a 
610.7 
July 1-15 ....-........ 
187.4 
323.6 
Scat. 
139.9 
9.7 
156.8 
Scat. 
817.6 
July 16-31 ... 
217.8 
131.4 
11.6 
275.3 
31.5 
163.4 
6.9 
837.9 
August 1-15............. 
110.5 
107.6 
19.9 
273.0 
68.2 
78.6 
31.5 
689.1 
August 16-31.. 
101.3 
129.6 
38.1 
252.8 
50.1 
18.7 
32.2 
622 8 
September 1-15. 
224.6 
142.0 
33.8 
202.8 
23.8 
15.6 
27.1 
669.7 
September 16-30... 
331.5 
226.0 
98.2 
201.6 
53.6 
Scat. 
17.2 
928.1 
October 1-15.. 
148.4 
327.5 
26.9 
180.5 
72.5 
8.6 
3.4 
767.8 
October 16-31.. 
79.7 
219.7 
23.5 
76.6 
70.9 
8.1 
a 
478.5 
November 1-15. 
55.8 
144.7 
49.6 
56.2 
59.3 
25.9 
a 
391.5 
November 16-30.. 
46.0 
135.4 
58.3 
48.2 
24.2 
19.7 
a 
331.8 
December 1-15.. 
33.6 
90.2 
141.1 
35.0 
5.0 
15.9 
a 
320.8 
December 16-31.. 
58.0 
89.1 
99.8 
44.6 
0.7 
20.9 
a 
313.1 
1896. 
January 1-15... 
48.6 
111.0 
88.2 
36.2 
a 
10.1 
a 
294.1 
January 16-31.. 
28.3 
151.0 
24.8 
17.3 
a 
19.5 
a 
240.9 
February 1-14-....... 
38.9 
91.6 
64.1 
19.6 
a 
4.8 
a 
219.0 
February 15-29. ...... — 
35.0 
82.0 
43.9 
27.0 
a 
3.8 
a 
191.7 
March 1 15.............. 
March 16-31....... 
33.3 
212.5 
20.9 
13.5 
a 
1.4 
a 
281.6 
April 1-5.. 
35.2 
400.7 
28.0 
14.6 
a 
1.9 
a 
480.4 
April 16-30. 
29.9 
1,011.2 
118.2 
15.2 
a 
9.8 
a 
1,184.3 
May 1-15 . 
102.3 
1858.4 
284.9 
124.6 
a 
28.0 
a 
2398.2 
May 16-31.. 
360.2 
705.9 
533.6 
270.8 
a 
30.8 
a 
1901.3 
June 1-15—............ 
343.5 
189.5 
168.6 
55.6 
a 
87.6 
a 
844.8 
June 16-30.. 
386.2 
358.7 
78.2 
211.1 
a 
230.8 
a 
1,265.0 
July 1-15................. 
202.9 
371.0 
39.3 
319.0 
a 
382.0 
a 
1,314.2 
July 16-31.... .......... 
152.1 
317.5 
11.8 
65.5 
2.5 
245.1 
Scat. 
776.5 
