STRONGYLID^i OK PALISADE- WOEMS. 



65 



Sclerostomes have a similar life-history. They do not enter the 

 blood as does S. armatum. The eggs are introduced in water. 



Fig. 52. — Sclekostomum tetracanthum. 

 Male (six times nat. size), aud enlai-yed anterior extremity. 



and probably forage, and give rise to embryos which encyst 

 direct in the walls of the caecum and colon, where they form 



Fig. 23.— Small Red Sclerostome (.5. nbrum) from Horse (female). 



tumourous patches similar to S. eqiiinum. Here lying in the 

 cysts the white coiled worms (fig. 17) produce inflammation, 

 colics, and serious anaemia. "When mature they make their 



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