28 ZOOPHYTES. 



in a monstrous fonn, or manifesting peculiarities, if it has not been too 

 remote, or if its elements have not been too remote to be affected. A sec- 

 tion an inch and a half long, comprehending the summit of a vacant stalk 

 that had borne a prolific head, was cleft at both ends on the 11th of Ja^ 

 nuary. A monstrous head was regenerated on the 26th from the upper 

 end, appearing as in PI. II. fig. 12, on the last of that moilth. It fell on 

 February 9th or 10th. 



From another stalk, also cleft on Januar}^ 11, a symmetrical head had 

 regenerated on February 11th or 12th. But from a third stalk, cleft at the 

 same time into unequal parts, two unequal heads were generated on Fe- 

 bruary 19. The one was sustained on a distorted neck ; the other, not a 

 fourth or a fifth of its size, had only eight tentacula. The latter outlived 

 its companion nearly a week. — PI. II. fig. 13. Here I concluded that an 

 internal bud had been within reach of the instrument. 



No definite rules or principles can anticipate the precise course of re- 

 production. 



On November 22, a specimen four or five inches long, with a fine 

 ovarium, was cut over near the root : and after the head fell the summit 

 was deeply cleft on the 25th. In 60 days a small head regenerated from 

 one division of the cleft, and flourished at right angles to the stem. — 

 PI. IV. fig. 7. It decayed on the fifth day. After a farther interval of 90 

 days, a florid head with 24 somewhat irregular tentacula regenerated, and, 

 like the former, at right angles to the stem ; but it rose straighter in a few 

 days, and on its decay in seven or eight, this was still more obvious. Now 

 an interval of no less than 143 days elapsed, when a third regeneration 

 was discovered rising within the stalk in an ovoidal form. It burst as a 

 head, less obliquely than the two preceding, and it nearly gained perpen- 

 dicularity, though subsisting but transiently, nor were the tentacula per- 

 fect. At this time the injury from the cleaving was nearly repaired, for 

 notwithstanding the previous extraordinary intervals, a fine and flourish- 

 ing head, the fourth, burst fourteen days after the decay of its precursor. 

 A thick neck sustained it, but several of its tentacula seemed to be muti- 

 lated : and on the sixth day it was in a decaying state, much earlier than 

 its aspect promised. — PL IV. fig. 8. In ten days, however, the embryo of 



