142 C. M. CHILD. 



each piece up to its closure separately. The pieces are num- 

 bered 1-9 in the order of their closure. 



In each case the first date given for a piece is approximately 

 the time when the elongation of the tentacles from the minute 

 bud-like stage began. In every case then the regeneration of 

 the tentacles has been retarded up to, or nearly to, this first date. 

 In a few cases closure occurred a few days before the first date 

 given so that the tentacles had attained a length of several milli- 

 meters by the time of examination. In almost every case the 

 ends closed first and from each end the new tissue gradually 

 extended along the cut towards the middle. 



No. i. October 10: Closed, oral end expanded, marginal 

 tentacles 57 mm. on half of disc opposite the longitudinal cut, 

 near the cut 23 mm.; labial tentacles just appearing on side 

 opposite cut, not present on cut side. 



October 17 : Marginal tentacles 1012 mm. on one side, 5-6 

 mm. on the other ; labial tentacles 12 on uncut side, just ap- 

 pearing on cut side. 



October 24: Marginal tentacles 1215 mm., almost equal on 

 all parts of disc except a short space without tentacles in region 

 of cut ; labial tentacles 34 mm., nearly equal on all parts. 



No. 2. October 24 : Closed ; just becoming well distended ; 

 marginal tentacles 3 mm. 



November i : Marginal tentacles 68 mm.; labial tentacles 

 just appearing, etc. 



No. 3. October 10 : Not closed by new tissue, but cut edges 

 rolled in such manner that slight distension is present ; marginal 

 tentacles 3 mm., blunt and sac-like. 



October 24 : Still about as before. 



November i : Closed and distended. One marginal tentacle 

 6-7 mm., others 35 mm.; labial tentacles just appearing. 



November TO: All marginal tentacles 78 mm., etc. 



No. 4. November i : Not fully closed by new tissue, but 

 slightly distended and with sac-like tentacles 23 mm. 



November 20 : Closed and distended. Marginal tentacles 4-5 

 mm.; labial tentacles just appearing, etc. 



No. 5. November 20 : Just closed and becoming distended. 

 Marginal tentacles 23 mm. on uncut side, reduced or absent on 

 cut side (Fig. 14). 



