f'LANAillA FELIl^A. 83 



accidental injury had severed a fragment 

 of the original tail from the body, all ex- 

 cept the slight ligament by which the nas- 

 cent planaria was now connected to it. 

 The reproductive operation ensued ; a new 

 Jiead vegetated from the anterior part; 

 while the clearness of the tail of the larger 

 animal proved it to have regenerated from 

 a wound. In time, however, and as the 

 young planaria gained greater strength, it 

 was to be anticipated, that its forcible ad- 

 hesion to the plane of position would tear 

 asunder the ligament. Its shape was near- 

 ly entire on the ninth of April, and it had 

 visibly begun to exert that faculty. The 

 second monstrosity consisted of a planaria, 

 whose posterior extremity terminated in 

 another smaller animal, united at right an- 

 gles to it, and what seemed the tail of the 

 latter protruded from the right side : thus 

 the larger planaria, properly speaking, had 

 no tail, or it merged in the body of the 

 other. 



The source of monstrosity is an abstruse 



