214 



ANIMAL PARASITES AND MESSMATES. 



and daughters, which are developed and vegetate in 



a peaceable community. 

 Each segment is a com- 

 plete being, which encloses 

 within itself an entire and 

 very complicated appa- 

 ratus for the fabrication 

 of eggs. 



We give (Figs. 51 and 

 52) the representation of 

 a solitary worm, peculiar 

 to man, of the natural 

 size ; and at the side the 

 scolex, usually called the 

 head, slightly magnified. 

 Under its first vesicular 

 form the solitary worm is 



Fig. 51. — Tania solium, or solitary worm ; 

 a, head, or scolex; b, tape formed of 

 many individuals, the last of which, com- 

 pletely sexual, separate under the name 

 of proglottides, and represent the adult 

 and complete animal. Each solitary 

 worm is a colony. 



Fig. 52.— a, Eostellum ; b, 

 crown of hooks ; c c, suck- 

 ers ; 1, scolex of the taenia 

 solium; 2, hooks expanded; 

 a, heel of the hook. 



