78 PLANARIA FELINA. 



prominence growing from the side of a pla- 

 naria a long time, that is, months after an 

 operation, resembled the stump of a tail. 

 The termination was acute, and there were 

 no tentacula, by which the anterior is al- 

 ways characterised; but marginal specks, 

 which, if regular, also distinguish the head, 

 appeared, and its movements were more 

 active than belongs to the subservient qui- 

 escence of the lower extremity. Thus 

 it was seen on the eighth of February, 

 while it was a mere stump on the first of 

 December preceding. Perhaps the opera- 

 tion here took place very near the spot from 

 whence either a head or a tail would pro- 

 ceed; or almost in that manner which may 

 give birth to either. However, had the 

 animal lived, I was induced to think, that 

 the more probable issue would have been 

 the former ; consequently, that the incision 

 was somewhat higher than the position of 

 the point in question. 



I remember, that after another experi- 

 ment made on the twenty-eighth of Sep- 



