71 



struction of the embryos. At last the tissue is found thickened, indu- 

 rated, and offers here and there tuberculoid grains formed from the old 

 nests of LinguatulcB. These altered glands are destroyed and are of no 

 further use in nutrition. The larvae create further troubles in their mi- 

 grations, but so little is known about these parasites that little can be 

 said. 



There is no treatment. Prevention is also difficult. If it should be 

 learned that we have these parasites here in considerable numbers the 

 best remedy would be to remove the dogs, which are certainly the cause 

 of large numbers being scattered in Europe. 



