The Sarcodina 259 



*^^Sf' 



Fig. 5. 40. A-C. Spirillina iniiipara (Ehrbg.). in reproductive test, x330 

 (after Myers): A. Multinucleate againont leaving test in preparation for 

 schizogony. B. Young organisms shortly after schizogony. C. Yoimg gamonts 

 with tests. D. Young organisms, products of schizogony, in parental test of 

 Iridia serialis, xl5 (after Le Calvez). E. Stage in development of Iridia di- 

 aphana; halo of tangled pseudopodia is about to produce the definitive 

 chitinous test; compare with earlier stages in Fig. 5. 35, D-F; xll5 (after 

 Le Calvez). 



Reproduction may be preceded by formation of a reproductive cyst, 

 composed of foreign particles as well as solids expelled by the organism 

 in preparation for reproduction. Reproductive cysts (Fig. 5. 40, A-C) 

 are characteristic of Patellina corrugata (96) and Spirillina vivipara (82, 

 98), for example. 



Gametogenesis and syngamy. The details of gametogenesis (gamogony) 

 vary in different species. In some cases, represented by Patellina corrugata 

 (96, 97) and Spirillina vivipara, two gamonts become associated in a 



