264 
PACIFIC SCIENCE, Vol. XXII, April 1968 
TABLE 8 
Length of Outer Seta as a Percent of Ramus in Various Populations of Cyclops kolensis 
LENGTH OF 
LENGTH OF 
WIDTH OF 
INNER SETA 
OUTER SETA AS 
INNER SETA AS 
RAMUS AS % 
AS % OF 
POPULATION 
% OF RAMUS 
% OF RAMUS 
OF LENGTH 
OUTER SETA 
Siberia 
37.1-70.6 
52.2-102.5 
15.05-28.6 
109-187 
50.6 
72.4 
20.5 
143 
Pt. Barrow 
54.8-66.2 
69.6-85.0 
19.5-24.1 
117-139 
60.2 
77.0 
21.6 
127 
St. Matthew 809 
45.7-83.3 
70.3-101.2 
88-213 
67.7 
85.5 
24.1 
126 
St. Matthew 81 4 
48.2-63.6 
61.2-90.7 
23.9-28.3 
105-170 
56.0 
75.2 
25.6 
134 
St. Matthew combined 
52.8-73.1 
67.0-94.6 
24.0-27.1 
99-165 
62.7 
80.3 
25.5 
128 
Grosser Ploner See 
63.1-70.7 
99.6-113.7 
17.7-19.8 
148-170 
66.7 
106.6 
18.7 
159 
Baikal 
59.4-71.0 
99.3-130.7 
17.2-20.8 
159-197 
65.2 
115 
19.0 
178 
Aneboda 
67.1-77.1 
118-134 
18.8-21.8 
167-181 
72.4 
126 
20.3 
174 
60.6-71.5 
107-130 
19.0-34.0 
156-195 
65.1 
115 
25.2 
177 
58 8-67.3 
103-119 
18.0-22.0 
162-180 
65.3 
113 
19.8 
173 
Poland 
16.5-24.3 
133-193 
72.7 
118 
20.4 
163 
Poland slides from 
56.6-100.3 
96-149 
14.4-25.3 
133-187 
USNM 
75.3 
118 
18.9 
161 
Marsh’s 
46-59 
63.9-85.0 
17.2-24.3 
123-156 
53.4 
74.7 
20.6 
140 
vicinus in the warmer 
shallower portions of Lake 
and Angara 
drainages. Mazepova 
(1961) pre- 
Baikal where it and 
C. kolensis may at times 
sented a map showing localities 
where it has 
occur together. Herbst (1955) also reported the 
co-occurrence of the two species in Grosser 
Ploner See, although C. vicinus was apparently 
less abundant and reached a peak of population 
at a different time than did C. kolensis. 
been found. One belt of records runs from 
southern Sweden through Poland and Germany 
to Lake Baikal ; a second belt follows the Arctic 
coast of Eurasia to Alaska. 
Currently three subspecies of C. kolensis are 
recognized. C. k. kolensis, C. k. baikalensis, and 
C. k. alaskaensis. C. k. baikalensis was described 
DISTRIBUTION 
If Kozminski (1936) was correct in believ- 
ing that Olofsson (1918) had specimens of 
C. kolensis from Spitzbergen, then it is known 
to occur in ponds there, in the New Siberian 
Islands, and in Alaska. Kozhov (1963) sum- 
marized records of the species in the Yeniesi 
as a new species by Vasilyeva (1950). Later 
Lindberg (1955) and Mazepova (I960) con- 
cluded that the form in Lake Baikal was not 
distinguishable from C. kolensis. Kozhov 
(1963) recognized C. baikalensis as an eco- 
logical subspecies. Lindberg recognized C. k. 
alaskaensis on morphological grounds and 
Mazepova (1961) concurred. 
