THE HUMAN AND THE POND AM(EBiE. 73 



chance, though, as I told you before, these "colored 

 folks" are more important than the " white folks." 

 The feet, or pseudopodia, of the savage tribe (Fig. 70) 

 are thicker and shorter than the feet of the civilized 

 kind (Fig. 71). It is very curious to watch how a foot, 

 or psEUDOPODiuM, is made, especially that of the pond- 

 amceba. First, there is a little swelling or lifting up of 

 the glassy rim, or ectosarc (Fig. 72) ; as this swelling 

 gets larger, some of the inner flesh, or endosarc, flows 

 into it, carrying the little grains till the swelling be- 

 comes quite filled (Fig. 73). Then the walking is so 

 funny ; the feet do not act as the feet of other animals, 



Fig. 75. 



Grains flowing inio Trying to walk. Stained with Magenta. 



Foot. 



carrying the body above them ; one stumpy foot is put 



out as far as it can reach (Fig. 74), then the body all 



runs into the foot ; and another foot is stuck out from 



some other part, and away goes the body into this foot. 



This is the way it gets on ; the feet actually swallowing 



the body ! The toad sometimes swallows its old skin, 



but the amceba is the only animal I know which is 

 4 



