122 
BULLETIN OF THE BUREAU OF FISHERIES. 
Table 12 . — Analysis of net plankton of lakes examined. 
The results indicate the number of individuals in 1 cm. 3 of water. 
The following abbreviations have been used for the different forms found in the net plankton: 
CLADOCERA 
COPEPODA. 
ROTIFERA. 
PROTOZOA. 
B=Bosmina. 
,An=Anab£ena. 
C=Ceriodaphnia. 
Ap=Aphanocapsa. 
Ch=Chydorus. 
Aph = Aphanizomenon . 
D=Daphnia. 
Coe = Ccelosphaerium . 
Dh =Daphnia hyalina. 
BLUE-GREEN ALG® 
G=Glceocapsa. 
Di = Diaphanosoma. 
Gl=Glceotrichia. 
Dp=Daphnia pulex. 
L=Lyngbya. 
H=Holopedium. 
M=Microcystis. 
L=Leptodora. 
N=Nostoc. 
P=Polyphemus. 
O=0scillatoria. 
0=Cyclops. 
rG=Gonatonema. 
Ca = Canthocamptus . 
M=Mougeotia. 
D=Diaptomus. 
GREEN ALG® 
P=Pediastrum. 
E=Epischura. 
S=Staurastrum. 
L=Limnocalanus. 
U=Ulothrix. 
A=Anursea. 
_Z=Zygnema. 
As=Asplancha. 
A = Asterionella . 
B=Brachionus. 
C=Cyclotella. 
C=Conochilus. 
F=Fragilaria. 
M =Mastigocerca . 
DIATOMS < 
M=Melosira. 
N=Notholca. 
N=Navicula. 
P=Polyarthra. 
S=Synedra. 
Pe=Pedalion. 
Pl=Plcesoma. 
R=Rattulus. 
S=Synchaeta. 
T = Triart hra. 
A = Actinosphaerium . 
C=Ceratium. 
D=Dinobryon. 
E=Epistylis. 
M=Mallomonas. 
U==TJroglena. 
,V=Vorticella. 
T=Tabellaria. 
AMERICAN LAKE, WASH., AUGUST 29, 1913. 
Depth, meters. 
Blue-green 
0-5... 
5-10.. 
10-15. 
15-20. 
20-25 
fD 820 
Di 4,900 
C 2,860 
E 2,850 
C 9,800 
E 1,220 
2,850 
*i2,*650' 
2,650 
1,420 
610 
200 
101,200 
12, 650 
189, 750 
12,650 
12,650 
75,900 
12, 650 
12,650 
12,650 
25,300 
