PHYLUM PROTOZOA. Animals in which there is one nucleus, or, if more than one nucleus, in which the nuclei art 

 disposed apparently irregularly and are not differentiated in relation to the functional tissues of the animal. 



Class i. GYMNOMYXA. Naked forms without distinct cortical layer and capable of emitting pseudopodia. 

 Order i. LOBOSA. Simple forms with blunt pseudopodia. 



Gymnamcebida. Without a shell. Ex. Amceba. 

 Thecamcebida. With a shell. Ex. Arcella, Difflugia. 

 Order i. FORAMINIFERA. Gymnomyxa with thread-like pseudopodia forming networks, and a shell the 



outside of which is covered by protoplasm. Ex. Polystomella, Globigerina. 

 Order 3. RADIOLARIA. Marine Gymnomyxa with radiating pseudopodia, central capsule and an additional 



skeleton of flinty needles. Ex. Collozoum, Thalassicola. 

 Order 4. HELIOZOA. Gymnomyxa with stiff radiating pseudopodia. Skeleton when present only in the 



form of isolated needles. Ex. Actinospharium, Actinophrys. 



Order 5. MYCETOZOA. Gymnomyxa of large size with branching pseudopodia. Reproduction by means of 

 cellulose-coated spores. The contents of many spores coalesce to form one individual. Ex. 

 Badhamia, Fuligo. 



Class 2. CORTICATA. Protozoa with a distinct cuticle and almost always a distinct cortical layer. 

 Order i. CILIATA. Forms provided with cilia. 



Holotrlcha. Ex. Paramcecium. 



Heterotricha. Ex. Stentor. 



Hypotricha. Ex. Stylonychia, Kerona. 



Peritricha. Ex. Vorticella. 



Order i. ACINETARIA. Forms provided with sucking tentacles. Ex. Acineta. 

 Order 3. FLAGELLATA. Forms provided with flagella. 



Lissofiagellata. Ex. Polytoma. 



Choanoflagellata. Ex. Monosiga. 



Phytoflagellata. Ex. Volvox. 



Dinoflagellata. Ex. Ceratium. 



Cystoflagellata. Ex. Noctiluca. 



Order 4. SPOROZOA. Parasitic forms, devoid of mouth, cilia, flagella or tentacles. The younger stages, at 

 least, are cell parasites. 



Gregarinida. Ex. Monocystis. 



Coccidiida. Ex. Coccidium, 



Haemosporidia. Ex. Malarial Parasite. 



