(:i-:i\m-;kal consideration of disease. 



65 



^^wwt 





Fig:, 33.^ — Taenia 3Iari;inata. 



Shows SfgiTients. h, c. 



Ht-ad latti ral view. 

 HtarJ antfriiif i.'ie\v. 



plished by means of ova, or by the production of living larvae. 

 The life historv or cycle of helminthes is very interesting;. In 

 some cases the urg'anism is parasitic in different animals during 

 the different stages of its life cycle; for instance the Taenia eras- 



