PHYLUM NEMATHELMINTHES 



311 



develop reproductive organs, and copulate, the young migrating 

 into the muscles and producing the disease as before. The 

 result of eating an ounce of " trichinised " or " measly " pork, 



B 



FIG. -249. Trichinella spiralis. A, encysted form, in muscle of host ; B, female ; C, male. 

 bh. connective-tissue envelope ; cy. cyst ; de. ejaculatory duct; e. embryos, /. tat-globules ; 

 h. testis ; m. f. muscle-fibre ; oe. pharynx ; or. ovary ; -tco. gonopore ; zh. cell-masses in 

 intestine. (From Lang's Comparative Anatomy, after Claus.) 



improperly cooked, might be the liberation in the human 

 intestine of perhaps 80,000 worms : and, if half of these were 

 females, each producing 1,000 embryos, some 40,000,000 worms 



