268 APPENDIX. 



TABLE XII. 

 GENETIC CYCLE OF THE SALP^. 



PROTOMORPHIC STAGE, 



(merged in the following). 

 The primordial Germ-mass. 



ORTHOMORPHIC STAGE. 



The Embryo, transformed into 



The solitary Salpa. 



GAMOMORPHIC STAGE. 



Catenated SalpcB. 



Spermary, Ovary. 



Primary Sperm Cell, Ovum. 



Special Sperm Cells "^ ( Germinal Vesicle 

 and Spermatozoa, j ( and Macula. 



FECUNDATION. 



TABLE XIII. 

 GENETIC CYCLE OF THE TREMATODA. 



PPOTOMORPHIC STAGE. 



The Infusorial Germ. 

 The primary Gregariniform Zooid (Bedia or Sporocyst. ) 



[The secondary Gregariniform Zooid]. 



ORTHOMORPHIC STAGE. 



Cercaria, penetrating into the tissues of animals. 



The same encysted, 



And then metamorphosed into a Distoma. 



GAMOMORPHIC STAGE, 



(distinguished from the former by the acquisition of sexual organs). 

 Spermary, Ovary. 



Primary Sperm Cell, Ovum. 



Special Sperm CeUs \ ( Germinal Vesicle 

 and Spermatozoa. ) \ and Macula. 



FECUNDATION. 



