109 



The lambs were kept for two months, aud were not infected in this 

 time. This experiment shows that either a longer time is necessary for 

 infection or that the embryo has to undergo some development or prep- 

 aration that was not allowed and of which we are ignorant. The speci- 

 mens fed were taken from slaughtered sheep, examined with a micro- 

 scope, and fed by placing the proglottides which contained living 

 embryos in the lambs' mouths and waiting until they had been swal- 

 lowed. 



The lambs while living with their infected mothers should have been 

 infected, providing infection by embryos fresh from the host be possible. 

 As this was not the case, further preparation and development of the 

 embryos outside of the ovine host seems necessary. 



