308 C. M. CHILD. 



just appearing in each piece. At aboral end new outgrowth 

 about 2 mm. 



C. In two pieces marginal tentacles 0.5-1.0 mm., in other two 

 slightly less advanced ; in all unpigmented : none with labial 

 tentacles. At aboral end no distinct outgrowth of new tissue. 



D. One piece partly filled, others collapsed. 

 December 2 : Twenty-five days after section : 



A. Marginal tentacles about 5 mm., with distinct transverse 

 pigment bands ; labial tentacles 1-1.5 mm - Aboral end as before. 



B. Marginal tentacles 3.5-4 mm., pigment bands visible but 

 lighter than in A; labial tentacles 0.5-1 mm. Aboral end as 

 before. 



C. Marginal tentacles mostly 3 mm., a few in two pieces 4 

 mm., all unpigmented ; labial tentacles just appearing. At 

 aboral end no distinct outgrowth of new tissue. 



D. One piece partly filled, but enclosed in slime which was 

 removed ; others still collapsed. 



December 12 : Thirty-five days after section : 



A. Marginal tentacles 6-7 mm., pigment bands dark: labial 

 tentacles about 2 mm. At aboral end outgrowth of new tissue 

 2-3 mm. 



B. Marginal tentacles 5-6 mm.; pigment bands lighter than in 

 A; labial tentacles 1-1.5 mm - At aboral end outgrowth of 

 new tissue 23 mm. 



C. Marginal tentacles 4-5 mm.; pigment bands visible, but 

 slightly -lighter than in B ; labial tentacles about I mm. At 

 aboral end outgrowth of new tissue I mm. 



D. One piece closed and partly filled as before, but no traces of 

 tentacular ridge. Three pieces still collapsed and enclosed in 

 slime which was removed. 



The series as a whole was concluded at this time, since the 

 only further changes in A, B and C consist of a slight increase 

 in length of the tentacles and the pigmentation. The pieces D, 

 however, which had not as yet shown any traces of regenerating 

 tentacles were kept under observation until January 21, 1903. 

 Up to this time only the one piece which had become partly 

 filled showed any signs of regeneration, the others remaining com- 

 pletely collapsed and surrounded by slime, which was removed 



