392 







Percentages 





No. of rings 

 regenerated 









No. of cases 



Regeneration of 



Regeneration of 





observed 



rings only 



unsegmented tract 



2 



1,3 



1,3 





3 



11,3 



11,3 





4 



17,4 



17,4 





5 



13,0 



13,0 





C 



10,3 



9,8 



0,5 



7 



8,3 



6,9 



1,4 



8 



4,5 



2,2 



2,3 



9 



8,0 



2,6 



5,4 



10 



7,4 



1,2 



6,2 



11 



5,8 



0,4 



5,4 



12 



3,8 





3,8 



13 



2,5 





2,5 



14 



4,8 





4,8 



15 



0,3 





0,3 



16 



0,8 





0,8 



17 



0,0 





0,0 



18 



0,5 





0,5 































































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Fig. 5. Regeneration in 

 Obelia after cuts at all levels. 

 — Abcissae. No. of rings 

 regenerated. — Ordinates. 

 No. of cases observed, per 

 cents. — Dotted line. Rings 

 only regenerated. — Dot- 

 and-dush-line. Unsegmented 

 tract also regen. — Con- 

 tinuous line. Sum of all cases 

 of regeneration. 



2 3 



5 6 7 8 9 10 11 K 13 ft /.J 16 f7 IS 



Personalia. 



Bern. Zum Prosector an der hiesigen Anatomie ist ernannt Herr 

 Dr. K. W. Zimmermann, bisher Prosector in Gießen. 



Frommannsche Buchdruckerei (Hermann Pohle) in Jena. 



