512 
BULLETIN OF THE BUREAU OF FISHERIES 
Table 1. — Specific gravity of blood of fresh-water mussels 
Scientific name 
Subfamly Unioninae: 
Fusconaia ebena 
Fusconaia undata 
Tritogonia verrucosa 
Amblema costata 
Quadruia pustulosa 
Quadrula metanevra. 
Unio popei ... 
Subfamily Anodontin®: 
Anodonta limneana 
Lasmigona compressa 
Subfamily Lampsilinae: 
Obliquaria reflexa 
Proptera alata 
Proptera laevissima 
Plagiola lineolata 
Ligumia recta latissima 
Lampsilis anodontoides 
Lampsilis fallaciosa.. 
Lampsilis siliquoidea pepi- 
nensis. 
Lampsilis ventricosa 
Actinonaias carinata 
Total 
Common name 
Number of 
individuals 
Blood— 
-specific gravity 
1.0000- 
1.0010 
1.0011- 
1.0020 
1.0021- 
1.0030 
1.0031- 
1.0040 
1.0041- 
1.0050 
1.0051- 
1.0060 
1.0061- 
1.0070 
1.0071- 
1.0080 
Mini- 
mum 
Aver- 
age 
Maxi- 
mum 
Niggerhead 
4 
3 
1 
1. 0043 
1. 0048 
1. 0057 
Pig toe 
7 
1 
1 
3 
1 
1 
1. 0018 
1.0036 
1. 0052 
Buckhorn __ 
7 
2 
4 
1 
1. 0011 
1. 0023 
1. 0031 
6 
2 
2 
1 
1 
1. 0022 
1. 0034 
1. 0042 
Pimple back.. 
i 
1 
1. 0043 
i 
1 
1.0043 
2 
2 
1. 0016 
1. 0017 
1. 0019 
Southern floater 
3 
i 
i 
1 
1. 0016 
1.0027 
1. 0034 
Heel splitter 
1 
1 
1. 0032 
Three-horned warty- 
6 
2 
1 
2 
i 
1.0017 
1. 0027 
1. 0043 
back. 
Pink heel splitter 
12 
1 
10 
1 
1. 0011 
1. 0024 
1. 0031 
Paper shell 
i 
1 
1. 0036 
2 
1 
1 
1. 0013 
1. 0021 
1. 0028 
1 
1 
1. 0026 
Yellow sand-shell 
17 
2 
4 
6 
2 
i 
1 
1 
1. 0007 
1. 0027 
1. 0063 
Slough sand-shell- 
29 
1 
12 
11 
4 
1 
1. 0007 
1. 0024 
1. 0055 
Lake Pepin mucket-- 
29 
5 
8 
10 
3 
i 
1 
1 
1. 0004 
1.0024 
1. 0078 
1 
1 
1. 0029 
River mucket.. 
IS 
1 
4 
5 
5 
1,0003 
1. 0025 
1. 0043 
19 species. 
145 
9 
38 
54 
26 
10 
5 
2 
1 
1. 0003 
1 1. 0026 
1.0078 
1 Average of all individuals. 
Table 2. — Individual specific gravity and pH data 
Date, species, and location 
Specific 
gravity 
pH 
Date, species, and location 
Specific 
gravity 
pH 
Niggerhead (Fusconaia ebena), Mississippi 
River, Nahant, Iowa: 
July 19, 1929 -- 
1. 0043 
7.6 
Southern floater (Anodonta limneana), canals 
from Rio Grande, Mercedes, Tex.: 
Mar. 24, 1930 
1.0016 
7.8 
*Do 
1.0044 
7.7 
Mar. 10, 1930 
1. 0021 
8.0 
Do 
1. 0049 
7.5 
Mar. 27, 1930 
1. 0034 
8.0 
Do 
1.0057 
Squaw foot (Strophitus rugosus), Mississippi 
River, Fairport, Iowa: 
June 27, 1929 
Pig toe (Fusconaia undata), Mississippi River, 
Fairport, Iowa: 
July 15, 1929 ... ... -- -- 
8.3 
1. 0018 
7.8 
Heel splitter (Lasmigona compressa), Missis- 
sippi River, Fairport, Iowa: 
July 10, 1929. . . . 
July 18^ 1929 
1. 0026 
7.7 
July 17’ 1929 
1. 0C34 
7.7 
1. 0032 
7.9 
1. 0037 
7.6 
Three-horned warty-back (Obliquaria reflexa), 
Mississippi River, Fairport, Iowa: 
July 13j 1929 
1. 0040 
7.8 
1. 0043 
7.7 
Aug. 28, 1929 
1.0017 
8.0 
*Do 
1. 0052 
Aug. 27, 1929 
1. 0018 
7.9 
Buckhorn (Tritogonia verrucosa), Mississippi 
River, Fairport, Iowa: 
Aug 22, 1929 - - 
Aug. 26, 1929 
1 0021 
7. 9 
Do 
1. 0031 
7.8 
1.0011 
7.5 
Aug. 27, 1929. 
1. 0032 
8 0 
July 26, 1929 
1. 0015 
7.9 
Do. 
1. 0043 
7.8 
July 12^ 1929 
1. 0021 
7.8 
Pink heel splitter (Proptera alata), Mississippi 
River, Fairport, Iowa: 
July 25 , 1929 
1. 0029 
7.8 
July 27 i 1929 -- --- --- - - 
1. 0029 
8. 1 
Mar. 4, 1930 
1 0011 
8.0 
7.9 
Do . 
1. 0029 
7.9 
Do 
1. 0021 
Mar. 7 1930 . . 
1. 0031 
Aug. 24, 1929. 
1 0021 
7. 7 
Three-ridge (Amblema costata), Mississippi 
River, Fairport, Iowa: 
Do 
1. 0022 
8.0 
Do 
1. 0022 
8.0 
1. 0022 
7.5 
Aug. 23, 1929. 
1 . 0025 
7 9 
1.0027 
7.7 
Do. 
1. 0026 
8.0 
July 19, 1929 - 
1. 0035 
7.6 
Do 
1. 0026 
7.9 
1. 0036 
7.9 
Do 
1. 0027 
7. 8 
July 19, 1929 - 
1. 0042 
7.8 
Aug. 24, 1929 
1. 0028 
7.9 
"Do 
1. 0042 
7.4 
Aug. 26, 1929... 
1. 0029 
8. 0 
Pimple back (Quadrula pustulosa), Mississippi 
River, Nahant, Iowa: 
July 19, 1929 - 
Aug. 22, 1929... 
1. 0031 
8.0 
1. 0043 
7.6 
Paper shell (Proptera laevissima), Mississippi 
River, Nahant, Iowa: 
July 19, 1929 
Monkey face (Quadrula metanevra), Mississip- 
1. 0036 
7.7 
pi River, Nahant, Iowa: 
July 19, 1929 
1. 0043 
7.7 
Butterfly (Plagiola lineolata), White River, 
Pope’s purple (Unio popei), canals from Rio 
Grande, Mercedes, Tex.: 
Newport, Ark.: 
Mar. 20, 1930 
1. 0013 
7 9 
1. 0016 
8.3 
Mar. 27, 1930 
1.0028 
7.9 
May 27, 1929 
1. 0019 
8.1 
Black sand-shell (Ligumia recta latissima), 
Mississippi River, Fairport, Iowa: 
Mar. 4, 1930 
Apr 251 929 
7.7 
June 3, 1929 - — 
8.1 
1.0026 
7.7 
