80 



Tjenia makginata, Batsch. 



Plate IX. 



Fig. 1. Adult taenia, natural size: a, head (tlie constricted part following is the 



necls) ; b, ijoiut 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 twenty-eight hooks ; b, 6, the snckers or bothria ; c, 



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

 Fig. 3. Crown of hooks enlarged : a, a, large hooks ; Z>, J>, alternating small hooks. 

 Fig. 4. Form of single hook. 

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



which produces the taenia when fed to a dog; a, the head; J, the bladdery 



portion filled with fluid. 

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



be evagiuated. 

 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. 



