422 



T. H. MORGAN. 



A. Regenerated portion just beginning to show metameres 



B. Regenerated portion normal 



a. Number of new metameres . . 6 



b. ,, „ . . 6 



c. Regenerated portion having one abnormality 



a. Number of new metameres 



b. „ 



^- >} )> 



d. „ „ 



^- >j » 



J- >> >j 



h. „ „ 



4 

 2 



12 



19 



6 

 35 

 16 

 25 



3 



4 

 11 



4 



(several) 

 15 



6 



D. Regenerated portion with two abnormalities . .6 



(Number of new metameres not recorded.) 



E. Regenerated portion with three abnormalities . . 4 



F. Regenerated end with more than three abnormalities . 12 



In D, E, and f the number of new segments was not counted, 

 but measurements were taken of the regenerated portions for 

 comparison with c, and were as follows : 



