b>) | 
Variation in Ephyre of Aurelia aurita. 233 
The relative frequencies of the different types of abnormality in the total 
number of ephyre obtained are shown in Fig, 15. 
As regards variation in the number of tentaculocysts, I found 29:9 per 
cent. to have fewer or more than the normal eight tentaculocysts. A 
14-82 
1 2 3 4 5 6 7 8 9 10 Tt 12 13 14 
Fic, 13. Relative frequency of Abnormal Ephyre of Aurelia, 
(The vertical column shows frequency per hundred, and the horizontal the 
| number of arms.) 
“comparison between this and the variation found in the number of 
tentaculocysts in adult forms is interesting. M‘Intosh found the variation 
in question to be 16 per cent., Browne 20:2 per cent., while Hargitt, working 
with Aurelia flavidula, found 25 per cent. showing an abnormal number 
of tentaculocysts. 
This points to the fact that there is a tendency during growth to 
elimination of the abnormal forms. 
