212 THE BEGINNINGS OF LIFE. 



speedily assumed a highly refractive and homogeneous 

 appearance. Why some should undergo such a change, 

 and not others, it seems quite impossible to say. One 

 can only assert the fact, and add that these highly re- 

 fractive ovoid corpuscles were, for the most part, more 

 prone to produce Fungus-germs than Monads. Many 

 of them soon grew out into dissepimented fungus fila- 

 ments, which rapidly assumed the Pemct Ilium mode of 

 growth. The spores which were abundantly produced in 

 terminal chaplet-like series were, however, small, homo- 

 geneous, spherical, and colourless. 



On several occasions I have seen Monads produced 

 in this way, by direct and immediate separation from 

 the pellicle; though, as M. Pineau had stated, on other 

 occasions they may be seen to arise in groups in which 

 they appear at first as aggregations of motionless cor- 

 puscles. The solitary mode of origin is that which has 

 been described by M. Pouchet, and although the details 

 given by him are not very full, so far as they go they are 

 in accordance with my own observations. M. Pouchet, 

 for instance, describes the flagellum as being closely 

 applied to the body, and motionless for a time. This 

 I have also found to be the case. 1 have, moreover, 

 on one or two occasions been able to watch all the 

 transitions from the mere motionless corpuscle to the 

 flagellated Monad ; just as, on other occasions, I have 

 watched almost similar corpuscles develop into Fungus- 

 germs. 



Sometimes the flagellum is seen attached to cor- 



