PLANARIA FELINA. 51 



taneous separation of parts ensues at all 

 times with these planariae; in every si- 

 tuation, and indifferently, whether the in- 

 dividuals be large or small. Having con- 

 fined four on the third of November 1810, 

 I remarked on the ninth and tenth, that 

 two of them had lost a fragment at the ex- 

 tremity of the tail. Some were taken 

 on the thirteenth of January 1811, which, 

 about a week afterwards, shewed defective 

 organs. Numerous spontaneous divisions 

 appeared among those removed from the 

 waters during the September succeeding ; 

 and an opportunity occurred of remarking 

 the like throughout the month of August 

 1812. 



There seems no exact rule or limitation, 

 in respect to the quantity separating. 

 Sometimes it is a minute fragment ; some- 

 times as much as leaves the proboscis ex- 

 posed, or towards a third of the body. The 

 largest portions are always heart-shaped, 

 and opaque, both from size and consistence; 

 thus obscuring the interior, if any thing is 



