240 The Sarcodina 



J-P), represented by Amoeba proteus (Pallas) Leidy em. Schaeffer and A. dubia Schaeffer 

 (131); Astramoeba Vejdowsky (132; Figs. .5. 25, E, 5. 26, G), erected for A. radiosa 

 (Ehrenberg); Chaos Linnaeus, represented by Chaos (Pelomyxa) caroUnensis (71, 75, 

 76, 160; Fig. 5. 25, G-L), multinucleate types which sometimes measure 4-5 mm. in 

 length; Dinamoeba Leidy (83, 107, 132; Fig. 5. 27, B), erected for D. mirabilis; Flabel- 

 luhi Schaeffer (132; Fig. 5. 27, A); Hartmanella Alexeieff (150; Fig. 5. 27, D); MuyoreUa 

 Schaeffer (132; Figs. 5. 25, B, 5. 26, H); Pelomyxa Greef (Fig. 5. 27, E), represented 

 by P. palustris (83, 101, 107, 152), multinucleate types which move by protoplasmic 

 flow and may reach a length of more than 2 mm; Thecamoeba Fromentel (132; Fig. 5. 

 27, C), established for T. {Amoeba) verrucosa (Ehrenberg); Trichamoeba Fromentel 

 (132; Figs. 5. 25, F, 5. 26, I); Vahlkampfia Chatton and Lalung-Bonnaire (24; Fig. 5. 26, 

 A-F). It is possible that Hyalodiscus Hertwig and Lesser (Fig. 5. 18, A-G) also should be 

 included in this group. 



Family 3. Endamoebidae. These are parasitic amoebae, found typically 

 in the digestive tract of invertebrates and vertebrates. The range of hosts 



mm 





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Fig. 5. 28. A-C. Entamoeba invadens Rodhain: amoeba in liver smear 

 from Coluber constrictor (A); binucleate cyst with many chromatoid bodies 

 (B); cyst with four nuclei (C); xl260 (after Geiman and Ratcliffe). D. 

 Endolimax terjnitis Kirby, xI600 (after K.). E. Endamoeba granosa Hender- 

 son, from termites; x500 (after H.). F, G. Endamoeba simulans Kirby, from 

 termites; amoeba with much ingested material (F); cyst with fom^ nuclei 

 (G); x530 (after K.). H. Hydramoeba hydroxena (Entz) Reynolds and 

 Looper, section through the outer surface of Hydra showing destruction of 

 the epithelium; x560 (after R. & L.). 



