A STUDY OF METAMERISM. 



419 



No. 1 

 2 

 3 

 4 

 5 



:n 



Numbers 6 and 7 came from a capsule that contained 12 worms. 



The following table gives the record of twelve young worms 

 (including those of the preceding table), showing the number 

 of metameres present : 



92-5 



I attempted to determine whether the young worms that 

 had abnormalities came in proportionally larger numbers from 

 individual capsules. Capsules were also examined to see 

 whether the number of embryos in a capsule was a factor in 

 the production of abnormalities. This examination ought also 

 to show whether the eggs from certain worms had a tendency 

 to produce abnormally joined metameres; if, for instance, in 

 all the capsules that contained a large number of embryos 

 many were abnormal, it would follow, with a great deal of pro- 

 bability, that the crowding (or smaller amount of food, &c.) 

 brought about (directly or indirectly) the result. If, on the 

 other hand, certain capsules, regardless of the number of 



