72 HISTORICAL PALAZONTOLOGY. 
posed of an apparently structureless animal substance of an 
albuminous nature (“‘sarcode”), of a gelatinous consistence, 
transparent, and exhibiting numerous minute granules or 
rounded particles. The body-substance cannot be said in 
itself to possess any definite form, except in so far as it may 
be bounded by a shell; but it has the power, wherever it may 
be exposed, of emitting long thread-like filaments (‘ pseudo- 
podia”), which interlace with one another to form a network 
(fig. 25,0). These filaments can be thrown out at will, and 
[ 
Fig. 25.—The animal of Noxzonina, one of the Foraminifera, after the shell has been 
removed by a weak acid; 4, Gromweia, a single-chambered Foraminifer (after Schultze), 
showing the shell surrounded by a network of filaments derived from the body substance. 
to considerable distances, and can be again retracted into the 
soft mass of the general body-substance, and they are the 
agents by which the animal obtains its food. ‘The soft bodies 
of the oraminifera are protected by a shell, which is usually 
calcareous, but may be composed of sand-grains cemented 
