358 Miss D. J. Lloyd. Influence of the Position of the 



A 



Fig. II. 



1. Fragment AP, 20 days ; 2. Ditto, 27 days ; 3. Ditto, 41 days. 4. Diagram of points- 

 of section. 5. Fragment CP, 20 days ; 6. Ditto, 41 days ; 7. Ditto, 62 days. 

 8. Fragment DP, 20 days ; 9. Ditto, 32 days ; 10. Ditto, 41 and 62 days. 11. Same,, 

 side view. 



cerebral ganglia are left in the fragment. In this case there is some 

 regeneration of tissue at the anterior end, but the heads produced are 

 defective (text- fig. II, 5-7). 



