INVERTEBRATA. 



375 



Another proliferating cysticercus is Coenurus cerebralis, 

 which occurs usually in the brain of the sheep and causes 

 the disease known as " staggers." The adult Cystotaenia 

 coenurus lives in the ileum of the dog and wolf : thus the 

 shepherd's dog may be a source of infection to the flock. 



The bladder- worm almost invariably found in the body 

 cavity of the rabbit when opened for dissection is the larva 

 of Taenia serrata, which lives in the dog or wolf. 



