LOBOSA 745 



exhibits a further advance upon the Amoeban type. The substance 

 of its body, which may be of the size of two millimetres, exhibits a 

 very clear differentiation between the homogeneous hyaline ectosarc 

 (B. a, d) and the contained eiidosarc, which contains such a multi- 

 tude of spherical vacuoles, 6, as to have a 'vesicular' or frothy 

 aspect. When it feeds upon the decomposing vegetable matter at 

 the bottom of the pool it inhabits, its body acquires a blackish hue, 

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

 there are seen in the endosarc a ^reat number of nucleus-like bodies, 



FIG. 5!S. PeJomyxa palu&tris: A, as it appears when in amoeboid 

 motion ; B, portion more highly magnified, showing , , the hyaline 

 ectosarc ; fo, one of the vacuoles of the endosarc ; r, rod-like bodies (pro- 

 bably Bacteria] scattered through the endosarc ; d, protruded exten- 

 sion of ectosarc with endosarc passing into it; e,e, nuclei ; /,/, globular 

 hyaline bodies. - 



e, e, and also many hyaline globular brilliant bodies, f,f, which are 

 regarded by Greef as germs or swarm-spores developed from nucleoli 

 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 amoeba, either by general undulations of its surface, 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 amoebiform bodies break forth, each 

 1 laving its nucleus and contractile vesicle. These at first live as 

 Ain<x,lw\ but afterwards pass into a resting state, assuming a spherical 



