278 



BIOLOGY OF THE PROTOZOA 



same central capsular protoplasm gives rise to anisogametes in the 

 form of two types of flagellated swarmers, but fusion of gametes 

 was not observed. B«""eteb 



Knowledge of the life cycle in Radiolaria, however, appears 



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ft? 





9 



10 









ii 



r.'Jr 





a 







. , FlG - teZ.—Actinophrys sol, maturation and copulation of gametes. 1 section of 



I-vt 4 ,Tn t0 t fertili + Zati , . n i 2 ' 3 " d /™ n of — leus and cell to form two gam eto- 



cytes, 4 , 5 6 first meiotic division of the two gametocytes; 7, 8, 9, second meiotic 



™ a , nd formation of gametes; 10, differentiation of the gametes; 11, 12 fusion 



of cell bodies and nuclei. (After B&af.) ' ' IUSIon 



