LIFE-CYCLE OF TAPE-WORM 



227 



from the same joint ; the joint becomes distended with 

 developmg embryos. These ripe joints are hberated, the 



Fig. 123— Life-history of Tcznia solium.— Aitev Leuckart 

 '' S'^,h^°'^'^d embryo in egg-case ; 2, proscolex or bladder-worm 

 atef 'hrad T^T'^^^'^^^J 3, bladder-worm wit?"g™ 



embryos are set free by rupture, and the vicious circle 

 may recommence. Happily, however, the chances are 



