APPENDIX. 269 



TABLE XIV. 

 GENETIC CYCLE OF THE CESTOIDEA. 



PROTOMORPHIC STAGE. 



The six-hooked Germ, penetrating into the tissues and converted 

 into a cyst, which becomes 



The Cysticercus, or the primary Echinococcus-vesicle. 

 [Secondary and subsequent Echinococci]. 



ORTHOMORPHIC STAGE. 



Tsenia-head (Scolex). 



GAMOMORPHIC STAGE. 



Cucurbitiform Proglottides. 

 Spermary, Ovary. 



Primary Sperm Cell, Ovum. 



Special Sperm Cells | ( The Germinal Vesicle 

 and Spermatozoa, j ^ and Macula. 



FECUNDATION. 



TABLE XV. 

 GENETIC CYCLE OF ANNELIDA. 



PROTOMORPHIC STAGE. 



The ciliated Germ, which is converted into 

 The Head-segment. 



ORTHOMORPHIC PHASE. 



Segments of the Body of the Annelidan. 



Caudal Zooids [of Syllis, 



FECUNDATION. 



