AMOEBINA 



307 



Fig. 140. a, b, Amoeba proteus (a, Xl30 (Schaeffer), b (Doflein)); 

 c, A. discoides, XlBO (Schaeffer); d, A. dubia, XlBO (Schaeffer); 

 e, A. verrucosa, X200 (Cash); f, A. striata, X400 (Penard); g, A. gut- 

 tula, X800 (Penard); h, A. limicola, X530 (Penard). 



in general outline with wart-like expansions; body surface usually 

 wrinkled, with a definite pellicle; pseudopodia short, broad and 

 blunt; nucleus ovoid; contractile vacuole; up to 200/^ in diameter; 

 fresh water among algae. 



A. striata Penard (Fig. 140, /). Somewhat similar to A. verru- 

 cosa, but small; body flattened; ovoid, narrowed and rounded 

 posteriorly; contractile vacuole comparatively large and often 



