PROTOZOA. 7 



Without a shell. 



Without a nucleus MONERA. 



With a nucleus AMOZBOIDEA. 



With a shell. 



Shell calcareous FORAMJNIFERA. 



Shell siliceous ... . . KADIOLARIA. 



Order I. MONERA. 



Homogeneous, structureless, naked particles of albumen capable 

 of nourishment and reproduction. No nucleus nor contractile 

 vesicle. 



In their mode of feeding and development, the Monera agree 

 with the Foraminifera. Several of the forms are subject to be- 

 coming encysted, and then to breaking up into spores, which may 

 or may not at first resemble the parent. Others, assuming an 

 amoeboid condition, may, when two come in contact, unite their 

 pseudopodia and form a contractile network [plasmodium]. In 

 Protomyxa the spores unite to form a body like the parent. 



There are about fifteen species known, which are found in fresh 

 water as well as in the sea. 



There are two divisions : 



Naked (never encysted), reproduced by division... GYMNOMONERA. 

 Encysted in a structureless membrane during a 



quiescent stage, then breaking up into spores ... LEPOMONERA. 



GYMNOMONERA. LEPOMONERA. 



Protamoeba. Protomonas=Monas. 



Protogenes. Protomyxa. 



Myxodictyum. Vampyrella. 



Myxaetrum. 



Order II. AM(EBOIDEA. 

 AMOSBINA. LOBOSA. ATRICHA. PEOTOPLASTA. SPHYGMICA. 



Homogeneous, nearly structureless animals, with nucleus and 

 contractile vesicles. Pseudopodia mostly short and broad, neither 

 ramifying nor coalescing. 



These are mostly freshwater organisms, although a few are 

 found in moss or in the earth ; they resemble the colourless 



