180] 



The Classification of Lower Organisms 



Fig. 35. — Life cycle of "Tretomphalus," i.e., Discorbis or Cymbalopora, from 

 Myers (1943); 1-3, microspheric individuals, in 3 releasing young megalospheric 

 individuals; 4-8 megalospheric individuals; 9-12, gametes and syngamy. 



