16 THE FOEAMINIFEEA 



are sometimes referred to as Bliizopoda reticularia 

 and BJiizojJoda lohosa. 



The classification given by Parker and Haswell in 

 their ' Textbook of Zoology ' ^ is also a very con- 

 venient one. The divisions or classes are more com- 

 prehensive than in the previous table. Thus 

 Class yi., the Reticularia (Foraminifera) of Eay 

 Lankester, is included in the 1st group, the Rhizo- 

 poda, together with the Classes III., lY., Y., and YIT 

 of that author. 



Phylum PROTOZOA. 



Class 1. RmzopoDA. — Protozoa in which the 

 amoeboid form is predominant, the animal always 

 forming pseudopods. Flagella are often present in 

 the young, and occasionally in the adult. Encys- 

 tation frequently occurs. 



Glass 2. Mycetozoa. — Terrestrial protozoa in 

 which the plasmodial phase is specially characteristic, 

 as is also the formation of large and often complex 

 cysts. 



Glass 3. Mastigophora. — Protozoa in which the 

 flagellate form is predominant, although the amcpboid 

 and encysted conditions frequently occur. 



Glass 4. Spoeozoa. — Parasitic protozoa without 

 organs of locomotion in the adult. Ency station is 

 almost universal, and the young may be flagellate or 

 amoeboid. 



Glass 5. Infusoria. — Protozoa which are always 

 ciliated, either throughout life or in the young con- 

 dition. 



1 A Textbook of Zoology, vol. i. pp. 43, 44. Macmillan. 1897. 



