424 
BULLETIN OF THE BUREAU OF FISHERIES 
Rotifera — Continued, 
Notholca. 
Ploesoma. 
Polyarthra. 
Rattulus. 
Synchaeta. 
Triarthra. 
Protozoa: 
Actinosphaerium. 
Ceratium. 
Dinobryon. 
Epistylis. 
Glenodinium. 
Mallomonas. 
Peridinium. 
Stentor. 
Uroglena. 
Vorticella. 
Blue-green algae: 
Anabaena. 
Aphanocapsa. 
Chroococcus. 
Coelosphaerium. 
Gloeocapsa. 
Leptobasis. 
Lyngbya. 
Microcystis. 
Oscillatoria. 
Spirulina. 
Green algae: 
Ankistrodesmus. 
Actinastrum. 
Botryococcus. 
Coelastrum. 
Chlamydomonas. 
Chlorangium. 
Green algae — Continued. 
Cosmarium. 
Crucigenia. 
Mougeotia. 
Pediastrum. 
Pandorina. 
Staurastrum. 
Scenedesmus. 
Sphaerocystis. 
Spondylosium. 
Tetraspora. 
Ulothrix. 
Diatoms: 
Asterionella. 
Amphora. 
Ceratoneis. 
Cocconeis. 
Cyclotella. 
Diatoms — Continued. 
. Cymbella. 
Epithemia.. 
Fragilaria. 
Gomphonema. 
Melosira. 
Navicula. 
Nitzschia. 
Stephanodiscus. 
Synedra. 
Tabellaria. 
Table 12 . — Numerical analysis of the net plankton catches of Karluk, Thumb, and O’Malley Lakes 
[The average number of organisms per liter of water from surface to bottom is indicated for the different series] 
KARLUK STATION 1 
Date 
Depth 
Cladocera 
Copepoda 
Nauplii 
Rotifera 
Protozoa 
Blue- 
green 
algae 
Green 
algae 
Diatoms 
July 19, 1927 
Meters 
0-125 
1.0 
8 7 
30.5 
244.0 
11 
273 
28,561 
4,457 
July 31, 1927 
0-125 
1.3 
19 
32.3 
257.0 
1,279 
543 
445 
4,802 
Aug. 13, 1927 . i- 
0-125 
.7 
4.0 
47.0 
214.0 
241 
1,547 
553 
Aug. 24, 1927 
0-125 
2.5 
12.6 
53.4 
106.0 
729 
65 
3,679 
542 
Sept. 13, 1927 
0-125 
2.1 
15.3 
37.7 
29.3 
43 
9 
3,681 
226 
July 10, 1928 -- — - 
0-125 
5.0 
32.4 
107.0 
42 
61 
2, 378 
752 
Sept. 3, 1928... - 
0-125 
8.1 
24.5 
100.0 
54.5 
133 
18 
4,121 
417 
July 9, 1929 
0-125 
1.2 
8.9 
57.5 
164.0 
204 
13 
2,645 
3,591 
Sept. 8, 1929 
0-125 
6.7 
35.5 
82.0 
70.0 
274 
191 
1,482 
1,624 
Julv 12, 1930 
0-125 
.4 
14.7 
3.3 
159.0 
309 
2,164 
7,025 
Sept. 9, 1930 
0-125 
1.5 
7.3 
26.0 
60.7 
177 
548 
634 
605 
KARLUK STATION 2 
July 21, 1927 - 
0-45 
1.8 
8.5 
9.8 
367.0 
14 
1,058 
23, 452 
67, 424 
Aug. 2. 1927 — 
0-45 
4.0 
7.0 
52.7 
316.0 
1,990 
2u0 
16, 721 
10, 285 
Aug. 12, 1927 
0-45 
6.2 
5.1 
28.1 
322.0 
663 
414 
2, 544 
3,596 
Aug. 26, 1927 — 
0-45 
7.0 
17.0 
51.0 
172.0 
629 
233 
8,399 
23, 997 
Sept. 15, 1927 - 
0-45 
.6 
6.5 
12.5 
17.2 
43 
6 
1, 298 
4, 114 
July 11, 1928.- 
0-45 
.2 
2.7 
8.9 
143.0 
154 
2, 853 
5,582 
Sept. 2, 1928 
0-45 
13.4 
33.0 
120.0 
90.0 
207 
59 
2, 555 
1, 270 
July 13, 1929. - 
0-45 
7.0 
21.8 
148.0 
242 
1, 105 
3. 896 
Sept. 7, 1929. 
0-45 
5.8 
37.6 
106.0 
92.0 
65 
1, 473 
1,009 
8,449 
July 13, 1930 — — — - 
0-45 
.5 
5.2 
2.9 
204.0 
430 
40 
2,283 
50, 268 
Sept. 2, 1930... 
0-45 
4.4 
19.9 
181.0 
240.0 
24 
484 
2, 338 
748 
KARLUK STATION 3 
July 19, 1927 
0-50 
1 0.9 
5.5 
15.3 
361.0 
21 
760 
19.910 
28, 485 
948 
Julv 9, 1929 
0-50 
| 1.0 
10.0 
20.6 
188.0 
281 
149 
1, 622 
1,081 
Sept. 11, 1929 
0-50 
7.1 
46.9 
122.0 
130.0 
221 
352 
j 1,911 
THUMB LAKE 
July 21, 1927 
0-10 
29.5 
29. 1 
24.1 
370.0 
8,896 
1, 375, 370 
Aug. 3, 1927 
0-10 
160.0 
33.8 
4.6 
405.0 
31, 172 
985] 825 
Aug 12, 1927 
0-10 
4.2 
13.4 
.9 
58.2 
355 
889, 000 
Aug. 26, 1927 
0-10 
17.8 
5.0 
.9 
133. 0 
195 
55,' 134 
Sept 16 1927 
0-10 
5.0 
.9 
1.4 
456.0 
178 
355 
309, 906 
July 9, 1928 
0-10 
2.5 
.9 
69.0 
87.0 
433 
660 
146,* 286 
Sept 3, 192 s _ 
0-10 
10.5 
5.8 
2.2 
78.4 
949 
11,979 
104 628 
July 11, 1929 
0-10 
.5 
.2 
6.0 
177.0 
6, 647 
130 
32?] 010 
Sept. 7, 1929 
0-10 
103. 0 
8.3 
6.0 
1, 433. 0 
174 
71, 948 
17; 302 
793, 320 
July 13, 1930 
0-10 1 
31.0 
46.2 
489.0 
1, 120. 0 
157, 400 
94, 724 
7 386 500 
Sept. 6, 1930 - 
0-10 
99.5 
12.8 
1.6 
2, 679. 0 
852 
118 
5, 828 
l] 752 
