2J2 



H. KOB A VASI! I : 



were ascertained beforehand to be free from distomes by repeated 

 examinations of the fecei. They were fed exclusively on boiled rice 

 and disinfected milk, while the experiments were carried on. 



So far I have experimented with nine kittens and two adult cats. 

 To the first kitten was given some flesh of Psendorasbora parva (this fish 

 and Leucogobio gimtheri containing in largest number the encysted 

 distonie in question) on May 17th (1910) ; and one month afterward 

 (on June i6th), examination of faeces showed the presence of distome 

 eggs. On dissection innumerable distomes were found in the bile 

 duct, gall bladder, hepatic ducts, pancreas and even in the duodenum. 

 The parasites were smaller than the human liver distome ordinarily 

 met with, but there can scareely be any doubt as to their specific 

 identity with the latter, as will be shown below. To two other 

 kittens was given some flesh of Leucogobio güntheri on June 23rd 

 (1910). One of them was killed and examined on June 29th, and 

 the liver was found infested by immature distomes. The other kitten 

 died during the night of July 3rd ; on examination the gall bladder 

 and bile duct were found to be filled again with the same immature 

 distome. Further, some flesh of Leucogobio giinthe'ri and Psendorasbora 

 parva was given to six other kittens and two adult cats, which were 

 killed respectively after 



(a) three hours. 



(b) fifteen hours. 



(c) nine days. 



(d) sixteen days. 



(e) twenty-two days. 



(f) twenty-six days. 



(g) thirty-five days. (Adult cat). 



(h) forty days. (Adult cat). 



The results of all these experiments were positive, and in 

 the last four cases the distomes obtained already contained mature eggs. 

 Additional experiments were also performed on several rabbits and 



