\' 



r produced ii ■' 



small, hom^ 



ads 



produd 



aration froi 

 :ed^ on otki 



It 



' 



3S— in w iir, 



)tionless cot- 

 at which \i 



;h the detail; 

 y go thej art 

 M. Pouchet; 



leing closf'l . 

 time. Tte , 



^5 



atch all 

 )uscle 



to 





to 



COf' 



77/£ BEGINNINGS OF LIFE. 



213 



puscles which still display almost unaltered Bacteria 

 imbedded in their substance: generally, however, the 

 corpuscles which separate from the pellicle in this 



undergo certain 



comparatively unaltered condition, 

 slow changes before the fiagellum is developed. The 

 contained Bacteria become more and more indistinct, 

 whilst the substance of the corpuscle grows rather more 

 refractive and assumes the appearance of ordinary proto- 

 plasm. Corpuscles about -g-cyVo" i^ diameter are often 



very obscurely granular and quite motionless. 



They 



grow, however, and when they have attained the size 

 of Wtttt" in diameter they frequently begin to exhibit 



4000 



slow undulating alterations in' outline, and tend to 



1 



assume an ellipsoidal form. One specimen -g-^Vo^' i^ 

 diameter, was seen without a fiagellum^ but slowly 

 alternating between the spherical and ellipsoidal forms. 

 Suddenly, at one extremity of the ellipsoid, a series 

 of rapid contractions and protrusions of its substance 

 were observed, and when they ceased, a motionless" 

 filament was seen bent around one side of the body. 

 Three minutes afterwards a vacuole appeared for the 

 first time at the opposite extremity of the ellipsoid. 

 The corpuscle remained almost motionless for twenty- 

 five minutes, merely exhibiting very slight changes in 

 outline j after thirty minutes the first slow bendings of 

 the fla2:ellum were seen: and after thirtv-five minutes 



^ V 



semi 



at, intervals of a minute or two. After forty minutes 

 the movements were pronounced and of a startling 



