116 



described by Mr. Ehrenberg. What has been hitherto 

 called division of individuals was only animalcules, 

 parts of a whole or of a chain of animals. I never 

 saw new limbs growing upon one of the animalcules 

 separated from the chain 5 I never saw any one tur- 

 ning double, and consequently propagating itself either 

 by a longitudinal or transversal division, nor after 

 such a separation, artificially or violently executed, 

 protracting its life, and still less, maintaining it, 

 recuperating its individuality, and producing new ani- 

 malcules of its own species. 



The Oscillatoriae dissolve themselves in the already 

 deceased lower parts, but a new animalcule never 

 arises out of the fragments separated from that part. 

 After having cut the filaments of the Oscillatoriae, 

 I saw the one to which a part of the head was joined, 

 creep , grow and continue to live , whilst the lower 

 part, which had been cut, formed no new head, died, 

 discoloured and discomposed itself. 



In a series of observations, continued during 

 several months, the Cosmarium stellinum alone pre- 

 sented an exception. After both animal bodies, half 

 of which is represented (fig. 22. A.), are separated, 

 a new sprout (fig. 22. B.) issues from the axe of 

 each body. This sprout, at first round, exhibits later 

 the first or principal incisions of its body, and after- 

 wards those of the second and third rank. All the 

 points and cuts are still obtuse and rounded 5 among 

 the 52 points coming on each side of the body, 19 

 only are developed, which, divided later by new 



