6 PROTOZOA. 



SUB-CLASS I. KHIZOPODA.* 



Gymnomyxa, either naked or with a shell, the shell generally 

 calcareous and often pierced with fine pores for the exit of the 

 pseudopodia. 



Only in rare cases is the shell substance of a silicious nature ; 

 in all other forms it is membranous, with or without adhering sand 

 particles, or consists of a calcareous deposit in a basis of organic 



FIG. 4. Miliola tenera, with network o* pseudopodia (after M. Schultze). 



matter. The shell is either a simple chamber, usually provided with 

 a large opening, or is many- chambered, that is, is composed of 

 numerous chambers arranged upon one another in a definite order 



On 



Intro- 

 Entwurf 



1895. 



