438 



PROTOZOOLOGY 



not spherical; extremely delicate pellicle shows 3 or 4 fine longitud- 

 inal lines which appear and disappear with the movement of the 

 body; 25-45/z by 20-35ju; fresh water among vegetation. 



Fig. 184. a, b, Amoeba proteus (a, X130 (Schaeffer), b, cyst (Doflein)); 

 c, A. discoides, X130 (Schaeffer); d, A. dubia, X130 (Schaeffer); e, A. 

 verrucosa, X200 (Cash); f, A. striata, X400 (Penard); g, A. guttula, 

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



A. guttula Dujardin (Fig. 184, g). Ovoid during locomotion, nar- 

 rowed posteriorly and often with a few minute, nipple-like denta- 

 tions; movement by wave-like expansions of ectoplasm; endoplasm 

 granulated, with crystals; nucleus vesicular; a single contractile vac- 

 uole; 30-35/z by 20-25)u; fresh water in vegetation. 



A. limicola Rhumbler (Fig. 184, h). Somewhat similar to A. gut- 



