MORPHOLOGY AND TAXONOMY OF THE SARCODINA 469 



Family 3. Euglyphidae. 



1 . Cells without symbiotic algae 2 



Cells with one or two blue-green symbiotic 



algae Genus Paulinella Lauterborn 



2. Test curved, retort-shape 3 



Test dome-shape; not curved 5 



3. Aperture terminal oblique 4 



Aperture terminal not oblique Genus Nadinella 



4. Test with regular, small plates; no mem- 



brane Genus Cyphoderia Schlumberger 



Test with amorphous plates; aperture with 

 membrane Genus Campascus Leidy 



5. Test circular in cross-section 6 



Test ellipsoidal in cross-section (com- 

 pressed) S 



(i. Dome with single long spine; plates fine 



( lenus Pareuglypha 

 I )ome without spine 7 



7. Shell-plates form teeth about aperture 



( renus Euglypha Duj. 

 Aperture with fringed collarette, no teeth 



( icnus Tracheleuglypha de Flandre 



8. Test asymmetrical 9 



Test symmetrical 10 



9. Aperture circular; oblique; invaginated 



Genus Trinerna Duj. 

 Aperture oval; oblique; not invaginated 



Genus Corythion Taran 



10. Test plates circular or oval 11 



Test plates rectangular Genus Quadrula Schultze 



1 1 . Test hyaline ; transparent ; plates numerous 1 2 

 Test brown or colorless; aperture oval 



Genus Assulina Ehr. 



12. Aperture as in Difflugia, circular. . .Genus Nebela Leidy 

 Aperture linear with undulate border 



Genus Placocista Leidy 

 Family 4. Gromiidae. 



1 . With one test aperture 2 



With two or more test apertures 



Sub-family 3. Amphistominae 



2. Filose pseudopodia directly from plasm 



Sub-family 1. Pseudogromiinae 

 Reticulate pseudopodia from peduncle 



Sub-family 2. Allogromiinai; 



Sub-family 1. Pseudogromiinae Wailes. 



1 . Test of one piece 2 



Test bivalved Genus Clypeolina Penard 



2. Test smooth; no foreign particles. . .Genus Lecythium 



Hertwig and Less. 

 Test covered with foreign particles 3 



3. Test ovoid; no hair-like cirri Genus Pseudodifflugia 



Schlumberger 

 Test ovoid; flexible; with hair-like cirri 



Genus Diaphoropodon Archer 



