CIV 



The beginnings of life. 



IV. 



evolution, however, occurs in these crea- 

 tures, as previously explained, at a more 

 advanced stage of their developmental 

 cycle. 

 Reproduction by the formation of Germs, in the sub- 

 stance of the organism, which have no genetic relation- 

 ship to the ' Nucleus/ 



a. According to Perty, ovules are produced in 



large numbers in certain Infusoria. He says 

 he has seen a specimen of Amphileptm 

 moniliger distended with from looto 150 

 minute germs. Paramecium versuium has 

 also been seen by the same observer to 

 contain a number of greenish ovules. (Mr, 

 Carter, and a few others, adopt these ob- 

 servations of Perty, though the larger 

 number of naturalists seem inclined to 

 throw doubt upon them, or to deny that 

 such bodies are ovules.) 



b, Eckhard recorded ^, with great precision, the 



mode of evolution and discharge of three 

 ovules, in Stentor ccerukus, which made 

 their appearance as minute granular glo- 

 bules. He described the mode of forma- 

 tion of the mouth, the evolution of 

 cilia, and the appearance of contractile 

 vesicles. These observations have been 

 confirmed by Oscar Schmidt. In Stentor 

 polymorphus^ Eckhard has also seen 

 similar globules within the body, though 

 he has not watched their development and 

 exit. 



/ 



^ * Ann. of Nat. Hist./ 1846, vol. xviii 



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