LOBOSA 



745 



exhibits a further advance upon the A mo.- ban type. The .substance 

 of its lxl v. which may be of the size of two millimetres, exhibits ;i 

 very deal- differentiation between the homogeneous hyaline ectosarc 

 (J">. a. (1) ami the contained endosarc, which contains such a multi- 

 tude of spherical vacuoles. ?>, as to have a -vesicular' or frothy 

 aspect. When it feeds upon the decomposing vegetable matter at 

 the bottom of the pool it inhabits. it> bodv acquires a blackish hue. 

 but in other situations it may be colourless. Besides the vacuoles 

 there are seen in the endosarc a great number of nucleus-like bodies. 



FK;. 578.-Pelom.yiKa. palustris: A, as it appears when iu amoeboid 

 motion; B, portion more highly magnified, showing u.a, the hyaline 

 ectosarc ; b, one of the vacuoles of the endosarc ; c, rod-like bodii 1 - i pro- 

 bably Bacteria) scattered through the endosarc; <?, protruded exten- 

 sion of ectosarc with endosarc pa^siirj int.. it ; c,/-, nuclei ; /,/, globular 

 hyaline bodies. 



e, e, and also many hyaline globular brilliant bodies. /'._/', which are 

 regai-ded by (Ireef as germs or swarm-spores developed from micleoli 

 set free within the general cavity of the body by the bursting of the 

 nuclei. This creature during the active period of its life moves like 

 an anueba. either by general undulations of its Mil-face, or by special 

 pseudopodial extensions, d. After a time, however, its movements 

 cease, and it looks as if dead : but by the giving way of its ecto- 

 sarc. a multitude of minute amtebiform bodies break forth, each 

 having its nucleus and contractile vesicle. The.-e at first live as 

 , but afterwards pass into a resting state, assuming a spherical 



