PKOTOZOA. 



Fig. 3. A, Amoeba proteus, with the psendopodia protruded, enlarged 200 diameters (after 

 Leidy) : n, Nucleus ; c, Contractile vesicle ; v, One of the larger food-vacuoles ; en, The granular 

 endosarc ; ec, The transparent ectosarc ; a, A cell of an Alga taken in as food (other cells of 

 the same Alga are obliquely shaded). B, Amaiba, radiosa, enlarged 500 diameters (after 

 Leidy). The body shows two large vacuoles, but no nucleus or contractile vesicle. The 

 long and delicate pseudopodia are protruded. 



OEDEE III. FOEAMINIFEEA, D'Orb. (RETICULAEIA, Carp.) 

 Sub-ord. 1. Imperforata. 



Fam. a. Gromidse. Gromia, Microgromia. 



Fam. 5. Miliolidae. Miliola, Nubecularia, Peneroplis, 



Orbitolites. 



Fam. c. Astrorhizidse. AstrorJiiza, Saccammina. 

 Fam. d. Lituolidse. Lituola, Endothyra, TrocJiammina. 

 Fam. e. *Parkeridse. Parkeria, Loftusia. 



