8o 



THE INVERTEBRATA 



Actinosphaerium (Fig. 33). Unprotected; with many nuclei, 

 against which the central filaments of the axopodia do not end. In 

 preparation for autogamy the nuclei are reduced in number and the 



Fig. 72. A-F, Successive stages in the autogamy of Actinophrys sol. After 

 Belar. ecp. ectoplasm; enp. endoplasm;y. jelly coat; ps. pseudopodium put 

 out by cJ, the male gamiete, towards ?, the female gamete. 



cytoplasm divides into as many corpuscles as there are nuclei. 

 Each of these then undergoes a process similar to that which occurs 

 in Actinophrys y forming a zygote which hatches as an independent 

 individual. In fresh waters. 



