■E. 



^^01^ the 4.' 



n? mov 



0- 



D 



^ the decolflll^ ^ 

 protruded 

 1 began to a. 

 1 of Trick 

 5 seen EugL t 



s encystmeii!, 

 ■cial charadefi 



to impljtkt! 



:helys may '- 

 transfoni' 



each of tts 



f 



■om 



) 



earaDCf 



?ir app 



■anstorra*' 



I 



hem 



i 



tor 



before !"■ 



. I 



into sp 



1 





3^^^ 



6. 



THE BEGINNINGS OF LIFE. 



463 



Fig, 86. 



Modes of Origin and Development of Ciliated Infusoria. ( X 600.) 

 a. A transforming Eiiglena, with red ' eye-speck ' still visible. 



h. 



c. 



d and e. 



/. 



h. 



n. 



A similar body, having many of its chlorophyll corpuscles still 

 green, fringed with almost motionless cilia. 



A completely decolourized sphere derived from a transformed 

 Euglena, provided with a few partly-motionless cilia. 



More advanced forms of a similar embryo developinp- into a 

 Dileptus(?). 



Vorticella, soon after its emergence from a cyst of Euglena 



origin, which subsequently develops into a striated 

 variety [g). 



A large Chlorococcus-vesicle, whose contents gradually imder- 

 goes decolourization (;), and at last becomes converted into 

 an animalized mass \h), which gradually shapes itself into 

 the form of an Oxytricha (Z). This after a time ruptures its 

 cyst and soon takes on the characteristics shown at m. 



r 



A form of Plxsconia derived from an embryo produced within 

 other, apparently similar, Chlorococcus-vesicles. 



