STROBILA 
No. 8 
(Continued) 
STROBILA 
No. 9 
STROBILA 
No. 10 
SrRoBILA 
No. 11 
STROBILA 
No. 12 
STROBILA 
No. 13 
’ STROBILA 
No. 14 
STROBILA 
No. 15 
No. 16 
Variation in Ephyre of Aurelia aurita. 231 
| Number 
Number 
Date of Arms 0 Notes 
phyre 
24.2.20 9 1 One interradial arm imperfectly doubled; other 
interradials imperfect; only 3 single gastric 
filaments opposite 1 interradial arm. 
" 12 1 Four interradial arms imperfectly doubled; 2 
opposite arms being represented by 1 lobe with- 
out tentaculocyst, and other lobe very small ; 
| 2 (opposite) pairs of gastric filaments only present. 
12.2.20 8 4 
14.2.20 8 5 
-12.2.20 10 1 Two perradial arms doubled. 
14.2.20 4 3 Four perradial arms missing. 
“5 5 1 Three perradial arms missing and another perradial 
without a tentaculocyst. 
» 6 1 Two perradial arms missing and another perradial 
arm without a tentaculocyst. 
f 6 1 Two opposite perradial arms missing. 
> 7 1 One perradial arm missing. 
99 8 2 { 
18.2.20 7 1 One perradial arm missing. 
14.2.20 12 1 Apparently due to doubling of 2 perradial arms and 
trebling of another perradial, 
, 8 3 
18.2.20 8 i 
24.2. 20 8 3 
12: 2.20 12 1 The most likely interpretation seemed to be that it 
was due to trebling of two perradial arms; if this 
interpretation is correct, the dextral component of 
one of the groups of three arms is as near to the 
adjacent interradial as to its neighbours, and the 
pair of gastric filaments is slightly adjusted so as 
to bring them almost opposite the interspace 
between the interradial and the component 
named. 
” 8 1 Normal, (Twin.) 
» 8 3 - 
14.2. 20 8 2 
12.2.20 8 3 
14.2.20 8 1 
18.2.20 8 i) Extra gastric filament to one pair. 
8 6 
24.2.20 8 7 
12. 2.20 6 1 Two perradial arms missing and another without a 
tentaculocyst. 
» 6 2 Two perradial arms missing. 
3 8 4 
» 9 1 One interradial arm doubled. 
14.2.20 6 1 Two opposite perradial arms missing. 
1 7 1 One perradial arm missing. 
»» 8 1 
9 8 1 ‘¢ Twin” tentaculocysts on 1 interradial arm. 
>» 9 1 One interradial arm doubled. 
12.2.20 8 10 
16.2.20 8 1 
