80 



T^NIA MARGINATA, Batscll. 



Platp: IX. 



Fig. 1. Adult tainia, natural size: a, bead (the coustricted jiart following is the 



neck) ; b, point at which the reproductive organs begin to develop ; c, c, c, 



adult segments either separated or about to separate. 

 Fig. 2. Head: a, the crown of tweuty-eight hooks; fe, h, the suckers or bothria; c, 



the neck, which is traBSversely wrinkled, but not segmented. 

 Fig. 3. Crown of hooks enlarged: a, a, large hooks; b, b, alternating small hookp. 

 Fig. 4. Form of single hook. 

 Fig. 5. Bladder or Cijuticcrcus lennicoJUs (taken from the omentum or caul of a sheep), 



which produces the tnonia when fed to a dog : a, the head ; b, the bladdery 



portion filled with fluid. 

 Fig. 6. Head of Fig. 5, enlarged, shows the opening from which the true head may 



be evaginated. 

 Fig. 7. Head of the" cystic worm, evaginated, shows the suckers and crown of hooks. 

 Fig. 8. Segment from near d Fig. 1 shows the branching uterus which is filled with 



ova. 



