SPECIAL MORPHOLOGY AND TAXONOMY OF SARCODINA 361 



3. Aperture terminal, oblique 4 



Aperture terminal not oblique Genus Nadinella 



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



brane Genus Cyphoderia 



Test with amorphous plates; aperture 

 with membrane Genus Campascus 



5. Test circular in cross-section 6 



Test ellipsoidal in cross-section (com- 

 pressed) 7 



6. Dome with single long spine; plates fine 



Genus Pareuglypha 

 Dome without spine Genus Euglypha 



7. Test asymmetrical 8 



Test symmetrical 9 



8. Aperture circular; oblique; in vagina ted 



Genus Trinema 

 Aperture oval; oblique; not invaginated 



Genus Corythion 



9. Test plates circular or oval 10 



Test plates rectangular Genus Quadrula 



10. Test hyaline; transparent; plates numerous 11 

 Test browii or colorless; aperture oval 



Genus Assidina 



11. Aperture as in Difflugia, circular. . . .Genus Nebela 

 Aperture linear with undulate border 



Genus Placocista 



Family 4. Gromiidae. 



1. With one test aperture 2 



With two or more test apertures 



Sub-family 3. AviPHiSTOMiNiE 



2. Filose pseudopodia directly from plasm 



Sub-family 1. Pseudogromiin/E 

 Reticulate pseudopodia from peduncle 



Sub-family 2. Allogromiin.e 



Sub-family 1. PseudogromiiruE, Cash 



1 . Test of one piece 2 



Test bivalved Genus Clypeolina 



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

 Test covered with foreign particles 3 



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



Test ovoid ; flexilile ; with hair-like cirri 



Genus Biaphoropodon 

 Sub-familj^ 2. Allogromiince, Rhumbler 



1. Test ovoid; plastic, aperture lateral . Genus Lieberkilehnia 

 Test rigid or plastic ; aperture terminal .... 2 



2. Test oval or pyriform; not encrusted 3 



Test cylindrical; encrusted with foreign 



bodies Genus Rhynchogromia 



3. Test and organism minute; often colonial 



Genus Microgromia 



Test large, oval, solitary Genus Allogromia 



Sub-family. Amphktommce, Cash 



1 . Test with two apertures 2 



Test with from three to six apertures 



Genus Microcometes 



