LIFE AND DEATH. 



127 



endoderm but of the whole body, is made up of ova, so that the 

 animal resembles a thin-walled sac full of egg's. The ova escape 

 by the bursting of the thin ectoderm, and when they have all 



ORTHONECTIDES (after Julin). 



8. First female form : the cap-like anterior part has become detached and the egg- 

 cells (eiz) are escaping. 9. Second female form: eiz = egg- cells; outside these are 

 the muscular layer (m) and the ectoderm (eld). 10 and 1 1. Two fragments of such a 

 female broken to pieces by spontaneous division : the egg-cells are embedded in 

 a granular mass, and undergo embryonic development in it at a later period ; the 

 whole is surrounded by ciliated cells. 12. Male discharging the spermatozoa by the 

 breaking up of the 2ctoderm (elcf) ; sp spermatozoa ; m muscle. 



