Lefevre, Reproduction and Parasitism in the Unionidae. 77c 



recemment publie des faits en faveur de cette maniere de voir. La 

 penetration des larves d'Orthonectides par les fentes genitales des 

 Ophiures, bien mise en lumiere par M. Caullery serait a mettre 

 ä cote du cas des Bilharzies. Tout ces faits mettent bien en 

 lumiere la generalite de la penetration cutanee, dout nous sommes 

 redevables ä notre president M. le Prof. L o o s s. 



Herr Prof. Dr. M. Hart mann (Berlin). 



Herr Prof. M. Caullery. 



Herr Prof. Dr. G. Lefevre (Columbia, Mo.) hält seinen 

 angezeigten Vortrag: 



Reproduction and Parasitism in the Unionidae. 



(Point authorship with W. C. Curtis). 



Inhalt: Types of marsupium and their histological struo 

 ture; breeding seasons; conglutination of embryos; different types 

 of glochidia and their reactions ; parasitism of glochidia on the f ins 

 and on the gills of fishes; susceptibility of fi&hes to infection; 

 duration of parasitism; histological changes in cyst-formation. 



Dieser Vortrag ist im Journ. of Exper. Zoology, Vol. IX, 

 No. 1, September 1910 veröffentlicht worden. 



