FIG. 79. Trichina spiral!?. A, encysted form, in muscle of host ; B, female ; C. 

 male. bh. connective tissue envelope ; cy, cyst ; de. ejaculatory duct ; e. em- 

 bryos ; f, fat globules ; h. testis ; in.f. muscle fibre ; oe. pharynx ; cv. ovary ; 

 ivo. gonopore ; zh. cell-masses in intestine. (From Lang's Comparative 

 Anatomy ', after Claus.) 



