Edward T. Browne 
91 
The specimens collected in 1893 belonged to the Ephyra stage and the 
examination of 359 individuals showed that 22 6 p.c. had either more or less 
than the normal number (eight) of tentaculocysts. (Table I.) 
TABLE I. 
Percentage Comparison of the Numerical Variation in the Tentaculocysts of 
the specimens taken in 1893, 1894, and 1898. 
lo9o 
1 QUA 
1 QQA. 
1 GQQ 
ioyo 
1 fiOQ 
Ephyrae 
359 
Ephyrae 
1116 
Adults 
383 
Series A 
Small 
Adults 
2000 
Series B 
Large 
Adults 
1000 
A and B 
combined 
3000 
0-05 
0-2 
0-1 
0-1 
0-1 
0-1 
01 
o 
_o 
6 
11 
0-5 
0-5 
0-6 
0-8 
0-7 
o 
7 
2-2 
30 
4-7 
3-7 
4-7 
4-1 
-♦^ 
8 
77-4 
79-1 
77-3 
79-8 
771 
78-9 
3 
9 
6-1 
6-7 
8-6 
5-7 
7-5 
6-3 
lU 
5-(» 
5-5 
4-2 
4-5 
5-2 
4-8 
o 
11 
3-3 
31 
2-6 
3-6 
19 
3 0 
S 
12 
3-9 
1-5 
1-8 
1-2 
1-8 
1-4 
IS 
0-8 
0-3 
0-3 
0-5 
0-4 
3 
U 
0-1 
0-1 
0-1 
0-1 
15 
0-3 
0-1 
01 
0-1 
In the spring of 1894 a larger number of Ephyrae were taken and 1116 
specimens examined. The tentaculocysts were found to vary in 20*9 p.c. 
In the summer of 1894 large adult specimens were caught and in 383 indivi- 
duals it was found that 22 8 p.c. showed variation in tlie number of tentaculocysts. 
Race of Aurelia in the River Tamar. 
During my visit to the Marine Laboratory at Plymouth in 1898 I was glad to 
hear from my friend Mr E. W. L. Holt that he had seen Aurelia in shoals at 
Saltash. Tliis town is situated on the River Tamar and is about three miles from 
Plymouth Sound, into which the river flows. It was near the mouth of this river 
that the specimens were taken in 1893 and 1894, so it is very probable that the}' 
also belong to the Tamar race of Aurelia. The river is tidal for about 20 miles 
and its water is very muddy and polluted. How far above and below Saltash the 
Aurelia ascend and descend with the tide has not yet been definitely ascertained, 
but under ordinary conditions they do not come down with the tide into Plymouth 
Sound. The Aurelia were first discovered by Mr Holt at Saltash in 1897, and 
since then they have been seen yearly in the Tamar. I think that the Tamar 
Aurelia may be safely regarded as a local race, and that they are born in the 
waters of the Tamar and spend their whole lives in the river or its tributaries. 
