2 26 THE BEGINNINGS OF LIFE. 



change except a slight increase in size. On the 

 eleventh day, in the portion of the pellicle which had 

 been transferred to the fresh hay infusion, many of 

 these stationary bodies, like the Monads and active 

 Amcebse, were found to have increased to such an extent 

 as to have doubled their transverse measurement. They 

 had also developed a distinct nucleus in their interior 

 (of a ring-like character); vacuoles appeared and dis- 

 appeared at intervals; and at the same time they ex- 

 hibited very slow and slight amoeboid changes in outline 

 {g, h, i). They were, in fact, now obviously converted 

 into sluggish Amoebse. On the seventeenth day many 

 of them were recognised in the pellicle, scattered 

 amongst the already-described encysted Amoebae. They 

 had again become motionless and slightly contracted in 

 dimensions; whilst their outer layer was condensed, 

 but not decidedly cyst-like. Many of the smaller sizes 

 were also seen. Seven days afterwards (twenty-fifth 

 day), when another portion of the transferred pellicle 

 was examined, it was found to be densely studded 

 throughout with thousands of encysted Amoebse, the 

 great majority of which were of the first variety and 

 were pretty uniform in size and appearance. But inter- 

 spersed amongst them were a considerable number of 

 the imperfectly-encysted Amcxb^, of different sizes. 

 Here and there, however, some of them — now mostly 

 about two'' ii^ diameter — presented an unusual appear- 

 ance. They had assumed a faint brown hue throughout 

 their whole mass, and segmentation had gone on within 



