78 Proceedings of the Koval Society of Edinburgh. [Sess. 
of the five arms or rays. The thermometer was left in position in every 
case until the mercury became stationary. 
As the temperature of the water varied slightly from day to day, 
the results of each series of observations are given separately in the 
following tables : — 
September 20, 1907, 2 to 3 p.m. 
Air, 13°’8 C. ; water, 13°'2 C. ; 24 shore crabs examined. 
Number. 
Body-temperature. 
Difference. 
16 
13°2 C. 
0 ? 0 C. 
6 
13-3 
o-i 
2 
13-4 
0-2 
24 
Mean, 13 -24 
0-04 
September 23, 10 to 1 1 a.m. 
Air, 13° - 6 C. ; water, 12 0, 2 C. ; 19 shore crabs examined. 
Number. 
Temperature. 
Difference. 
14 
12°2 C. 
0 ? 0 C. 
4 
12-3 
o-i 
1 
12*4 
0-2 
19 
Mean, 12-23 
0-03 
September 23, 3 to 4 p.m. 
Air, 13° ‘9 C. ; water, 12° *4 C. ; 6 shore crabs, 10 edible crabs, and 1 lobster examined. 
Number. 
Temperature. 
Difference. 
Shore / 5 
12°4 C. 
0 ? 0 0. 
crabs \ 1 
12-5 
o-i 
6 
Mean, 12*42 
0-02 
r 4 
12-4 
o-o 
Edible j 3 
12-5 
o-i 
crabs ] 2 
12-6 
0-2 
1 1 
12-7 
0*3 
10 
Mean, 12-5 
o-i 
Lobster 1 
12-5 
0-1 
