TABLE Ix. THE C O N C E ~ ~ A T I O N
OF VARIOUS Ioxs IS THE PLASMA OF TWNTCATES EXPRESSED A s A PERCENTAGE OF THEm
CONCENTRATION IN SEA WATER
Na
K
Ca
c1
Phalluaia mammillata
P . mammillata
P . mammillata
P . mammillata
Ciona intestinal&
Pyura etolonifera
Chelyosoma siboja"
Halocynthia azcrantium
Salpa maxima
-
99.4
-
96.3
97
-
100.3
109
-
100.2
114.58
104.2
95.5
128
99
-
93.3
111.7
101.9
102
98
99
98.8
96.6
87-3
101.5
83
104
102.9
103.6
109.9
105.7
102.6
99
51
61.6
52.5
99
53
52
r r
1 1
PH
Neutral
5 to 7
6.6
Author
Heme, 1912
Webb, 1939
Robertson, 1954
Bialaszewicz. 1933
Bialaszenicz, 1933
Endean, 1955a
Kobayashi, 1938
Smith, 1970a
64.9
7.5 Itobert,son, 1954
112.9
95.9
94.9
102.4
a The original data for Chelyosoma yiboja given by Kobayashi (1935) must have included material from ruptured blood cells
and gave N sulpliate value of 1 754b. The data included here are from fluid termed perivisceral by Kobayashi (1938) but which was
probably froiu tht' pcricnrdium. For fiirtlicr discussion see Robertson (1 954).
OF VARIOUS Ioxs IS THE PLASMA OF TWNTCATES EXPRESSED A s A PERCENTAGE OF THEm
CONCENTRATION IN SEA WATER
Na
K
Ca
c1
Phalluaia mammillata
P . mammillata
P . mammillata
P . mammillata
Ciona intestinal&
Pyura etolonifera
Chelyosoma siboja"
Halocynthia azcrantium
Salpa maxima
-
99.4
-
96.3
97
-
100.3
109
-
100.2
114.58
104.2
95.5
128
99
-
93.3
111.7
101.9
102
98
99
98.8
96.6
87-3
101.5
83
104
102.9
103.6
109.9
105.7
102.6
99
51
61.6
52.5
99
53
52
r r
1 1
PH
Neutral
5 to 7
6.6
Author
Heme, 1912
Webb, 1939
Robertson, 1954
Bialaszewicz. 1933
Bialaszenicz, 1933
Endean, 1955a
Kobayashi, 1938
Smith, 1970a
64.9
7.5 Itobert,son, 1954
112.9
95.9
94.9
102.4
a The original data for Chelyosoma yiboja given by Kobayashi (1935) must have included material from ruptured blood cells
and gave N sulpliate value of 1 754b. The data included here are from fluid termed perivisceral by Kobayashi (1938) but which was
probably froiu tht' pcricnrdium. For fiirtlicr discussion see Robertson (1 954).