SB 
THE OCEAN WORLD. 
soon becomes more and more distinct, and now the Infusoria literal 
cuts itself into two parts. We see, at first, the fragment of glutiu ot " 
substance fluttering on the edge of tho plate; the two halves 
separate from each other very quickly, each moiety having finally 11 
perfect resemblance to the primitive animal. This process is rep 1 ' 1 '' 
sented in Fig. 20, a and n being the adult, c the same in course 
separation, o after its completion. Assuredly this is one of the &° s 
remarkable phenomena which the study of living beings can preset’ 
“ Hy this mode of propagation,” says Dujardin, “ an infusoria is 
half of the one which preceded it, the fourth of the parent of that, 
eighth of its grand-parent, and so on, if we can apply the terms fatk^ 
or mother to animals which must see in its two halves, the grandfatl> ef 
Fig. 28. Propagation of an Infusoria by spontaneous division. 
himself by a new division again living in his four parts. We ffiig |jt 
imagine such an infusoria to be an aliquot part of one like it, wh> c1 ’ 
had lived years, and even ages before, and which by continued 
division into pairs might continue to live for ever by its success^ 
. development.” 
This mode of generation, however, enables us to comprehend ^ 
miraculous fecundity of these beings. The process defies calculati 0 ”’ 
if we wished to be precise. We may, however, arrive at a proxim 9 * 1 . 
estimate of the number which may be derived from a single individ 11 ’ 1 
by this process ' of fission. It has been found that at the end 
month two stylonicliim had a progeny of more than one million 8,11 
forty-eight thousand individuals, and that in a lapse of forty-two ^ 
