AMOEBINA 365 



E. testudinis Hartmann. In intestine of turtles, Testudo graeca, 

 T. argentina, T. calcarata and Terrapene Carolina. 



E. harreti Taliaferro and Holmes. In colon of snapping turtle, 

 Chelydra serpentina. 



E. terrapinae Sanders and Cleveland. Trophozoites 10-15/i long; 

 cysts 8-14m in diameter, tetranucleate when mature; in colon of 

 Chrysemys elegans. 



E. invadens Rodhain. Resembles E. histolytica. Trophozoites 

 measure 15.9ju in average diameter (9. 2-38. 6^ by 9-30/x); active loco- 

 motion; feed on leucocytes, liver cells, epithelial cell debris, bacteria, 

 etc.; nucleus similar to that of E. histolytica. Cysts 13.9/i (11-20/x) in 

 diameter; 1-4 nuclei; glycogen vacuole; chromatoid bodies acicular, 

 rod-like or cylindrical. 



Hosts include various reptiles: Varanus salvator, V. varius, 

 Tiliqua scincoides, Pseudohoa clelia, Lampropeltis getulus, Ancis- 

 trodon mokasen, Matrix rhomhifcr, N. sipedon, N. sipedon sipedon, 

 N. cyclopion, Python sebae, Rachidelus brazili, etc. Zoological Gar- 

 dens in Philadelphia (Geiman and Ratcliffe) and Antwerp (Rodhain). 



The amoeba produces lesions in the stomach, duodenum, ileum, 

 colon and liver in host animals. Time for excystation in host's intes- 

 tine 5-14 hours; time for metacystic development in host's intestine 

 7-24 hours; optimum temperature for cultural growth 20-30°C. 

 (Geiman and Ratcliffe, 1936). Ratcliffe and Geiman (1938) observed 

 spontaneous and experimental amoebiasis in 32 reptiles. 



E. ranarum (Grassi). In colon of various species of frogs; re- 

 sembles E. histolytica; 10-50/i in diameter; cysts are usually tetranu- 

 cleate, but some contain as many as 16 nuclei; amoebic abscess of 

 the liver was reported in one frog. 



E. minchini Mackinnon. In gut of tipulid larvae; 5-30/x in diam- 

 eter; cyst nuclei up to 10 in number. 



E. apis Fantham and Porter. In Apis mellifica; similar to E. coli. 



E. hrasiliensis (Carini) {Brumptina brasiliensis C.) (Fig. 166, c). 

 In the cytoplasm of many species of Protociliata; trophozoites 5.3- 

 14.3m in diameter; cysts about 9.4/^ in diameter, uninucleate; no 

 effect upon host ciliates even in case of heavy infection (Stabler 

 and Chen, 1936). Carini and Reichenow (1935): trophozoites 8-14ju 

 in diameter; cysts 8-1 2;u; either identical with E. ranarum or a race 

 derived from it. 



Genus lodamoeba Dobell. Vesicular nucleus, with a large en- 

 dosome rich in chromatin, a layer of globules which surrounds the 

 endosome and do not stain deeply, and achromatic strands between 

 the endosome and membrane (Fig. 164, c); cysts ordinarily uninu- 



