lycetx 1 



Th 



t 



a 



■■otatorv 



'M 



seems 



-insists 

 - of the 

 ^ores 



I 



^^''"H that o( 

 ^ of the watd 



the 



■pore was 



the body mi 

 .sh disCjWk 

 Lit into several 

 )dies now com- 



of MjxmftU 



s were si 

 egan to 

 :o rami 



1 



of the eve'- 

 throughout i« 



ures 



more 



now 



W 



increa-* 



nuin 



eroui 



fereflC^' 

 icles in 



IW: 



arti 



flr^P 



rov 



•ided *» 



r^^ BEGINNINGS OF II FE. 



197 



interior, as, well as the so-called vacuoles — the latter, 

 which constantly change in size and in situation^ being 

 usually filled with fluid contents \ 



Another most interesting mode of development of 

 reproductive germs occurring in the higher nucleated 



forms of Amcebse 



Haeckel 



Nicolet 



whichj though they continually change their form^ do not 

 send out complicated processes like those of the Troto- 

 myxa^ multiplication takes place by means of fission and 



i 



also by germ-formation. The process of germ-forma- 



F 



tion — closely resembling that by which the spores are 



produced in Confe 



area — only takes place towards 



the close of the life of the parent Amoeba^ whose exist- 

 ence is terminated by the setting free of its numerous 



At a certain stage in the life of one of these 



progeny. 



individuals — such as would have been named Amoeba 



prlnceps by Ehrenberg — the granules contained in the 



^ Although a Protomyxa is capable of increasmg much in size and 

 complexity by the ordinary processes of growth, there is also another 

 process by means of which the larger individuals are produced. Pro- 

 fessor Haeckel says, 'I could many times immediately follow in the 

 swarms of Protomyxa under my eyes the formation of a plasmodium by 

 the growing together (concrescence) of two or more Amoebae/ Some- 

 times it happened that two Amoebae, attaching themselves to a single 

 Navicula, would, by drawing themselves over it, meet in the middle 

 and then become united to one another. After the process of digestion, 

 the united plasma-mass would free itself from the silicious diatom shell, 

 but would reinain as a single individual. To such fusions of originally 

 distinct living things we shall have again to refer. 



^ Thompson's Arcana Nahirce^ 1859 (Paris), p. 27. 



