64 BOARD OF AGRICULTURE. 



It is perfectly safe to say that at least twenty-five sheep are 

 killed by parasites derived from dogs, for every one killed by 

 the teeth of dogs ! It is also safe to say that more than fifty 

 persons die from the same parasites, for every one that dies of 

 hydrophobia ! And yet this work of destruction goes on 

 silently and almost unobserved, except by professional men 

 week after week and year after year. The loss of human life 

 every year more than counterbalances all the good that all the 

 dogs in the civilized world can possibly do. In Iceland it is 

 stated that one-sixth of all the deaths are caused by one of 

 the dog-parasites (EchinococcMs) . The same parasite occurs 

 also, not unfrequently, in all other parts of the world where 

 dogs are kept, and causes most horrible disease and death. 

 To this we may add the Pentastoma^ which man also derives 

 from dogs, and in all probability several other parasites, in- 

 ternal and external. 



INTERNAL PARASITES OF THE CAT. 



CESTODES. 



Tcenia crassicollis Rud. Intestine, young in rats and mice. 

 T. elliptica Batscli. Small intestine ; common. 

 T. canis-lagopodis Rud. Intestine ; common in Iceland. 

 Dibothrium dedpiens Diesing. Intestine, also in leopard, 

 ounce, etc. Perhaps Bothriocephalus felis Creplin. 



TREMATODES. 



Amphistoma truncatum Rud. 



Distoma lanceolatum Mehlis. Bile ducts ; rare. 



NEMATODES. 



Trichina spiralis Owen. Intestine, young in muscles. 

 Dochmius tubceformis Dujadin. Duodenum. 

 Ollulanus tricuspis Leuck. Intestine, and young in muscles. 

 Ascarismystax Rud. Small intestine ; common. 



ACARINA. 



Pentastoma denticulatum Rud. Cysts on liver, etc. 



This list includes all those that I have found recorded from 

 the house cat, but doubtless many others may occur. 



