C. M. CHILD. 



cles of the size shown in Figs. 9 and 10 in from four to five days 

 at this season of the year. These pieces required seven days 

 and the circle of tentacles is by no means complete. Only those 

 portions of the oral end which are exposed and not completely 

 collapsed bear tentacles. 



These pieces were examined at intervals of a few days during 

 three months. 



November /. --49 days after section. The pieces were much 

 reduced in size owing to absence of food. During this time the 

 tentacles had shown no farther growth, but had decreased in size 

 so that they were scarcely visible. A part of one of the pieces 



FIG. 10. 



FIG. 9. 



FIG. 7. 



FIG. 8. 



FIG. ii. 



had constricted off, a not uncommon occurrence in cases of long 

 continued collapse or severe injury. 



November 10. - - 58 days after section. It was found that the 

 piece represented in Fig. 9 was finally closing. During the 

 experiment the new tissue had been gradually- extending from 

 the ends of the longitudinal cut, slowly drawing the cut edges 

 together, the last portion to close being near the middle. 



The tentacles of this piece are now increasing in size again, 

 being 0.5 i mm. in length. 



The other pieces have not closed, though in each some growth 

 of new tissue along the cut surface has occurred. In these 



