CHAPTER XXI. 



TRANSFORMATIONS OF EUGLEN^E AND OTHER ORGANISMS'. 

 MODES OF ORIGIN OF CILIATED INFUSORIA. 



Crystals and Organisms. Variability of latter. Derivative Organisms. 

 Observations of Dr. Gros and of Author upon Euglense. Their 

 Resolution into Fungus-germs and Monads. Resolution of other 

 Euglenee into Diatoms and Algoid Corpuscles. Transformations 

 of entire Euglenge into Diatoms, Desmids, and Pediastrse. Trans- 

 formation of others into Confervse. Interchangeability of Algse 

 and Lichens. Relations of Algse to Mosses. Observations of 

 Dr. Gros and M. Brebisson. Community of Nature between 

 Algse, Pediastrese, Desmids, and Diatoms. The latter form a 

 Divergent Series. Transformations of Euglense into Amoebse and 

 Actinophrys. Their subsequent Development into Ciliated Infu- 

 soria. Direct Transformations of Euglense into Ciliated Infusoria. 

 Variable Nature of resulting Forms. 



Other Modes of Origin of Ciliated Infusoria. Transformations of 

 Chlorococcus Vesicles into Oxytricha and Plsesconia. Similar 

 Mode of Origin of Vorticella. Development of latter also from 

 bud-like outgrowths, and from the 'pellicle.' Origin of other 

 Ciliated Infusoria from Monads and Amrebse. Testimony of 

 various Observers. Dependence of Forms upon the size of Trans- 

 forming Matrices. Observations of M. Nicolet upon Chara. Mode 

 of Origin of Otostoma within Nitella-filament. Origin of almost 

 simila-r forms of Infusoria from Animal Matrices. Pangenesis in 

 Rotifers. Their Resolution into Actinophrys, Peranemata, and 

 Arcellinse. Tendency of these Forms to give rise to Ciliata. 





