THE TAPEWORM 



191 



of similar buds growing from the attached "head" end (called 

 scolex) results. The completed worm then has a superficial 

 resemblance to a segmented form such as an annelid, but the 

 resemblance is only superficial, for the segments (called pro- 

 glottids) are not typical metameres or somites and have little 



FIG. 83. Taenia sollum. A, Entire tapeworm with proglottids; , scolex with 

 sucking discs and crown of hooks. (From Leuckart.) 



organic relation to the whole worm. Each segment has a com- 

 plete set of reproductive organs which are quite as complex as 

 the reproductive organs of annelids or other animals of similar 

 grade (see Fig. 84). When mature, the proglottids are de- 



