CESTODA. 



l6 7 



As these joints are pushed by younger interpolated buds 

 further and further from the head, they become sexually 



FlG. 74. — Life history of T&nia solium. — After Leuckart. 



1. Six-hooked embryo in egg-case ; 2. proscolex or bladder-worm 

 stage, with invaginated head ; 3. bladder-worm with evaginated 

 head ; 4. enlarged head of adult, showing suckers and hooks ; 

 5. general view of the tape-worm, from small head and thin 

 neck to the ripe joints ; 6. a ripe joint or proglottis with 

 branched uterus (cf. Fig. 73) ; all other organs are now lost. 



mature, developing complex hermaphrodite reproductive 

 organs. The ova are fertilised, apparently by spermatozoa 



