466 BIOLOGY OF THE PROTOZOA 



Family 4. Dianemidae MacBr. em. 



Capillitium threads attached at one end only 



or free Genus Margarita 



Capillitium threads attached at each end 



Genus Dianema 

 Family 5. Prototrichiidae MacBr. em. 

 A single genus Genus Prototrichia 



Sub-Class III. FORAMINIFERA D'Orb. 



Cushman (1928) has published excellent keys to families and 

 genera of Foraminifera, including 45 families and -411 genera. It 

 is unnecessary to repeat these here. 



Sub-class IV. AMOEBAEA Butschli. 



Naked forms; pseudopodia lobopodia or 1am- 



ellipodia Order 1. Amoebida 



Testate or membraned forms Order 2. Testacea 



Order I. Amoebida Aut. 



1. Diphasic forms, ameboid and flagellated 



stages Family 1 . Bistadiidae 



Monophasic forms, amoeboid only 2 



2. Free-living; water, earth, moss, etc 4 



Parasites of cavities and tissues 3 



3. Reproduction by binucleated spores 



Family 4. Sporamoebidae 

 Reproduction by division and by uninucle- 

 ated spores Family 2. Endamoebidae 



4. Without cytoplasmic '"Nebenkern" 



Family 3. Amoebidae 

 With cytoplasmic "Nebenkern" . Family 5. Paramoebidae 

 Family 1. Bistadiidae Doflein. 



Two flagella in flagellated phase Genus Dimastigamoeba Alexeieff 



One flagellum in flagellated phase Genus Craigia Calkins 



Three flagella in flagellated phase Genus Trvmastigamoeba 



Whitmore 

 Family 2. Endamoebidae Calkins. 



1. Vegetative forms with one nucleus 2 



Vegetative forms with two nuclei. . .Genus Dientamoeba 



Jepps and Dobell 



2. Encysted stage with huge glycogen mass 



Genus Iodamoeba Dobell 

 Encysted stage without large glycogen 

 mass 3 



3. Individuals of "limax" type. .• Genus Endolimax Kuenen and 



Swellengrebel 



Individuals of ameba type Genus Endamoeba, Leidy 



Family 3. Amoebidae Doflein. 



1. Actively moving forms with lobose pseudo- 



podia 2 



Sluiiiiish forms; no definite pseudopodia 



( ienus Pelomyxa 



2. Large forms, several pseudopodia 3 



Small forms moving as one pseud< ipodium . 4 



