72 ZOOPHYTES. 



Fig. 7. Pyrulum, a, at the extremity of a branch. 



8. Pyrulum, a, unfolding as a Medusa. 



9. Medusa ocilia (octocilia), in progressive developement. 



10. The same free. 



11. Medusa duodecilia (ciliis duodecim). 



12. The same, viewed in plane from below. 



All the subjects of this Plate, except fig. 1 , enlarged 



