NEW FACTS AND VIEWS CONCERNING THE 

 OCCURRENCE OF A SEXUAL PROCESS IN 

 THE MYXOSFORIDIAN LIFE CYCLE.^ 



DR.. RHODA ERDMANN 



The classic observations of Balbiani, Biitsclili and 

 Tlieloban on tlie myxosporidian development do not in- 

 clude tbe occurrence of a sexual process which compre- 

 hends the forming of a syncaryon in the life history of 

 this protozoan group. Doflein (1898 and 1901) suggested 

 two places in the life cycle of the myxosporidian where a 

 caryogamy might probably take place. In the next period 

 of investigations on myxosporidia the occurrence of this 

 sexual process was stated by various authors, but they 

 differ widely in the conception of the place in the life cycle 

 in which the copulation occurs. Mercier, Awerinzew, 



sary to have a uniform nomenclature^ and to discard all term's which are 



pressions as gametes, gametes and Gameten are admissible. Identical and 

 adequate terms are eapsoilogenous cell, cellule capsulog&ne, Polkapselzelle. 



which form the membrane of each single spore ; cellule d 'enveloppe, envelope 

 cells, and Hiillzellen should be used for those cells which form the mem- 

 kerne should be substituted. If the cellular origin of the pansporoblast mem- 

 brane is not ascertained, envelope, membrane d 'enveloppe or Hiille may 

 be used. The terms Eestkern, residual nucleus are misleading. Somatic 



