The Sarcodina 249 



Genera included in the Arcellidae, Difflugiidae, and Euglphidae are 

 listed below. 



Family 1. Arcellidae. Amphizouella Greef (Zounmyxa Niisslin) (107; Fig. 5. 29, L); 

 Arcella Ehrenberg (31, 83, 107; Fig. 29. C-F); Coch'liopodium Hertwig & Lesser (Ss'. 

 107; Fig. 5. 31, L, M); Corycia Dujardin (107; Fig. 5. 31, A); Cryptodiffliigia Penard 

 (107; Fig. 5. 31, H, 1); Hyalosphenio Stein (107; Fig. 5. 31, B, C); Pamphagus Bailey 

 (Chlamydophrys Cienkowski) (4, 56, 83, 107; Fig. 5. 31, N. O); Plagiophrys ClaparMe & 

 Lachmann (107; Fig. 5. 31, J, K); Pseudochlamys ClaparMe & Lachmann (83, 107; 

 Fig. 5. 31, F, G); PyxidicuJa Ehrenberg (107; Fig. 5. 31, D, E). 



Fig, 5. 34. Euglyphidae. A, B. Trinema enchelys (Ehrbg.) Leidy (test 40- 

 lOOfi long); oral view showing surface pattern; schematic longitudinal section 

 (after Penard). C-E. Sphenoderia lenta Schlumberger (test averages 35;^ long); 

 lateral view, lest in optical section; oral view (outline); surface pattern (after 

 Penard). F-H. Nebela vitraea Penard (test 170-200^ long), broad and narrow 

 aspects (in outline); surface pattern (after P.). I, J. Placocista lens Penard 

 (test 65-67yLi long); broad aspect, hyaline plates shown at margin; narrow 

 aspect in outline (after P.). 



Family 2. Difflugiidae. Campascus Leidy (83, 107; Fig. 5. 33, A, B); Centropyxis Stein 

 (32, 68, 83, 107; Fig. 5. 32, N); Clypeolina Penard (107, 109; Fig. 5. 32, G-I); Cucurbitella 

 Penard (107; Fig. 5. 32. D, E); Cystidina Volz (151); Diaphorodon Archer (107; Fig. 5. 

 33, C); Difflugia Leclerc (68, 83, 107; Fig. 5. 32, A); Frenzelina Penard (107); Heleopera 

 Leidy (83, 107; Fig. 5. 32, L, M); Lecquereusm Schlumberger (107; Fig. 5. 29. A, B); 

 Nadinella Penard (107; Fig. 5. 32. J); Oopyxis Jung (68); Parmulina Penard (107;' Fig. 

 5. 32, K); Phryngalella Penard (107); Pontigulasia Rhumbler (107; Fig. 5. 32, B, D); 

 Pseiidodifflugia Schlumberger (83, 107; Fig. 5. 32, O, P). 



