354 



NEMATHELMINTHES. 



lines are present. The female generative opening well forward. The posterior 

 end of the body of the male has two terminal cones between which the cloaca is 



\ 



FIG. 296.- -Trichina, spiralis. a, Mature female Trichina from the alimentary canal; G, 

 genital opening ; E, embryos ; Oo, ovary, b, Male ; T, testis. c, Embryo, rf, Embryo 

 which has migrated into a muscle fibre, already considerably enlarged, e, The same 

 developed into a coiled Muscle Trichina, and encysted. 



