PLANARIA FELINA. 69 



one artificially produced, vegetate from the 

 mutilated neck, to restore the integrity of 

 the planaria? I certainly did anticipate 

 that such would be the case, because the 

 principal end of reproduction is to repair 

 wanting parts, that the animal economy 

 may be preserved entire ; and so in fact it 

 happened. 



On the eighteenth of November, the 

 operation of Nature was fully accomplish- 

 ed ; a new and perfect body, crowned by a 

 head, had grown out of the side of the pa- 

 rent animal, distant about two-thirds of the 

 total length from the extremity of the tail. 

 Marginal specks, the eyes or spiracula, 

 were quite perceptible on the twenty-se- 

 cond ; the superfluous organization was 

 complete and well defined, and its incre- 

 ment continued still advancing. Though 

 provided with only one proboscis, both bo- 

 dies were immediately enlarged by the ab- 

 sorption of food, which plainly proved nu- 

 tritious. 



I could not contemplate this creature 



