ADVENTITIOUS REPRODUCTION IN HARENACTIS. 7 



new mesenteries, but none with so large a number of tentacles 

 as in the above case and none with mouth and esophagus. Be- 

 sides the distinctly radially symmetrical groups, others, showing 

 the most various degrees of radial and bilateral symmetry and 

 asymmetry, appeared. Brief descriptions and figures of a few 

 characteristic cases are added here. 



Fig. 7 shows a case of considerable interest: here a disc with 

 four radially arranged tentacles and with four well-developed 

 mesenteries, but no mouth, appeared on one side of the line of 

 union and was gradually elevated by the growth of a long column 



FIGS. 7-11. 



beneath it. No further tentacles were added during the life of 

 this specimen and it finally died, apparently from the same causes 

 as others. 



