ANIMAL PARASITISM 



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Fig. 400. — Structure of tapeworm to show different stages of maturity. At lower 

 left. Taenia insiformis, dog- tapeworm, scolex with hooks and sucker discs. At 

 lower right, mature proglottids. Above, scolex and proglottids of three ages. The 

 reproductive organs and pore are shown in most proglottids. (Courtesy or Wards 

 Natural Science Establishment, Inc.) 



