360 



ZOOLOGY. 



7. The Sporocyst. The ciliated larva swims about 

 until it meets with a specimen of the fresh-water snail 

 Limnaea truncatula. This snail is of small size, abundant 

 in moist pasture lands such as those in the valley of the 



OVUM 



MIRACIDIUM 



SPOROCYST REDIA CERCARIA 



Fig. 187. STACKS IN THK LIFK-HISTORT OF FASCIOLA HEPATICA. 



Thames, and amphibious in its habits ; that is to say, it is 

 scattered over the pastures during floods, and is able to 

 live in the wet grass as well as in the ditches and pools. 

 The fluke larva bores its way into the soft tissues of the 

 snail, penetrating them by means of its anterior papilla 



