PENARDIA MUTABILIS. 91 
Dimensions : Diameter when at rest 90-100»; fully 
extended (including pseudopodia) 300-400 pu. 
In swampy ground, adjoming Copped Hall Lodge 
Road, Epping Forest, June, 1901. 
The animal was not abundant in the locality men- 
tioned, but all the individuals met with had the above- 
mentioned features sufficiently well marked. Rotifers 
seemed to form its staple food. When one of these 
came in contact with the pseudopodal filaments it was 
firmly held and escape became impossible. Other 
pseudopodia closed around it; then streams of proto- 
plasm set in from opposite directions, drawing the 
prey gradually closer to the surface of the body, till it 
became completely enveloped. During this process 
the body of Penardia became congested ; the pseudo- 
podia not in use were withdrawn, or reduced in size ; 
and in a comparatively short space of time the prey 
was completely engulphed, the animal then remaining 
for an indefinite period mert. 
Genus 10. CHLAMYDOMYXA Archer, 1875. 
Chlanydomyxa ArcHeR in Q. J. Micr. Sci. XV, n.s. (1875), 
p. 107. 
Body naked, or, during the encisted or resting 
‘phase, “enclosed in a multi-laminated cellulose enve- 
lope, whence, through an apparently lacerated -aper- 
ture, the non-nucleated granule-bearing protoplasmic 
contents emerge, irregularly giving off at the same 
time, in an arborescent manner, gradually tapering 
ramifications, and emitting numerous extremely slender 
hyaline ramifying threads (filamentary tracks) occa- 
sionally coalescing and forming a more or less complex 
‘labyrinth,’ along which proceed from the central 
mass, as from a reservoir, numerous little, therein pre- 
existent non-nucleated globular bodies, which, during 
progression, assume a fusiform figure ” (Archer, Le.). 
