A UMNOLOGICAIv STUDY OF THE FINGER TAKES. 
603 
Tablt XVIII. — Observations on Gases — Continued. 
Depth, 
meters. 
Temper- 
ature. 
Carbon dioxide. 
Oxygen. 
Depth, 
meters. 
Temper- 
ature. 
Carbon dioxide. 
Oxygen. 
Free. 
Fixed. 
Cc. per 
liter. 
Per cent 
of sat. 
Free. 
Fixed. 
Cc. per 
liter. 
Per cent 
of sat. 
SENECA LAKE. AUG. 3. 1910. 
SKANEATELES LAKE, AUG. 13, 1910. 
0 
20 . 2 
— 2. 50 
22. 00 
6.8s 
104. 6 
0 
22. 7 
— I. 25 
21. 25 
6. 75 
107. 6 
— 2. 50 
20 
II. 6 
— I. 00 
22. 00 
8. 40 
108.4 
20 
8.6 
—0. 55 
21. 25 
9. 20 
III. 0 
30 
8-3 
“O. 50 
22. 00 
8. 80 
105.4 
25 
Neut. 
8. 88 
104.9 
50 
5-2 
8. 70 
99.0 
30 
6.8 
-fo. 25 
21. 25 
8. 77 
loi. 4 
75 
4. 6 
8. 90 
97-5 
50 
5-9 
-l-o- 75 
21. 40 
8. 6s 
97-9 
130 
+0. 25 
22. 20 
9. 10 
99.2 
83 
5- 5 
+ 1. 00 
21. 80 
7.89 
88.4 
150 
0. 40 
22. 20 
8. 55 
93-0 
173 
4- 2 
H-i. 26 
22. 20 
8. 45 
91. 7 
DISTRIBUTION OP PLANKTON. 
Table xix shows the vertical distribution of the various plankton organisms, giving the number of 
individuals per cubic meter of water at the different depths. The members grouped in the different 
columns are indicated as follows: i. Cladocera, B=Bosmina, C=Ceriodaphttia, 'D—Daphnia, Di — 
Diaphanosoma, 'L,=Leptodora, P=Polyphenius; 2. Copepoda, C=Cyclops, 'D=Diaptomus , B=Epischura, 
h=Limnocalanus\ 3. Nauplii; 4. Rotifera, Kn=Anuraea, As—Asplanchna, C=Conochilus, N= 
Notholca, V\=Ploesoma, V=Polyarthra, T=Trtarthra; 5. Protozoa, C=Ceratium, T)=Dinobryon, 
M=Mallomonas, V=Vorticella; 6. Green and blue-green algae, Aji=Anahaena, Ap= A phanocapsa, 
Aph= A pkanizomenon, C=Clathrocystis, Coe=Ccelosphceriuni, 0 =Gloeocapsa, B—Lyngbya, O= 0 scil- 
latoria, S=Staurastrum; 7. Diatoms, A=Asierionella, C=Cyclotella, F—Fragilaria, M—Melosira, 
'N=Navicula, S=Synedra, T=Tabellaria. 
When present in relatively small numbers, some forms showed an irregular distribution — that is, 
they were not noted at certain depths, but were found both above and below these depths. This does 
not mean, however, that they were entirely absent at the intermediate levels, but that they were not 
found in that portion of the catch which was counted. 
Table XIX. — Analysis op Plankton Catches. 
CANADICE LAKE, AUG. 24, 1910- 
Depth, meters. 
Cladocera. 
Copepoda. 
Nauplii. 
Rotifera. 
Protozoa. 
Green and 
blue-green 
algae. 
Diatoms. 
3.650 
c 
2, 800 
700 
c 
252,000 
An 
Ap 
C 
6,400 
42, 200 
189,000 
A 
F 
63,300 
1,400 
D 
48, 600 
V 
5 r 700 
42, 200 
P- 
IDi 
5 j 000 
c 
4. 200 
St 700 
c 
252, 000 
c 
294, 000 
A 
126, 600 
2, 100 
D 
20, 700 
V 
2,100 
G 
63,300 
T 
21, 100 
8 
P. 
IDi 
2, 100 
c 
2, 100 
10, 700 
P I, 400 
c 
63.300 
An 
700 
A 
189, 900 
2, 800 
D 
12, 100 
V 
700 
c 
168, 800 
1 ° 
700 
c 
2, 800 
40,000 
P 4, 200 
C 
D 
84, 400 
C 
42, 200 
A 
759,600 
D 
12, 800 
M 
2, no, 000 
G 
42, 200 
