PEXAKDIA MUTABILIS. 91 



Dimensions : Diameter when at rest 90-100 p.; fully 

 extended (including pseudopodia) 300-400 p. 



In swampy ground, adjoining 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 Avas 

 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 podia not in use were withdrawn, or reduced in size ; 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 inert. 



Genus 10. CHLAMYDOMYXA Archer, 1875. 



Chlamydomyxa 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 oft' 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, I.e.). 



