174 



PROTOZOA 



Fig. 122. — Clalhniliiia ,-h-:.:<iiis. .1, with extcndcil pseudopodia; B, divided into two 

 cvsls; C, zuospore; n, nucleus; cv, contractile vacuole. 



Fig. 123. — Encystmcnt of Acthiospha-rium, schematized to the extent (hat in III 

 and IV, succcssi\'e stapes are shown in the same liKurc. I, just encysted animal; 

 II, formation of the primary cysts, after resorption of most of the nuclei; III, i and 2, 

 division of primary into scconrlary C)'sts; 3, 4, nraturation of secondary cysts; 3, forma- 

 tion of first, 4, of second (lolar f^lobule, 5, fusion of secondary cysts (autogamy); 

 IV, 1-4, staj^es of conjugated cysts; 5, escape of young Atiini's[>lucriiiiii. 



