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 (Echinococcus). . 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. 
Tenia crassicollis Rud. Intestine, young in rats and mice. 
T. elliptica Batsch. Small intestine ; common. 
T. canis-lagopodis Rud. Intestine ; common in Iceland. 
Dibothriwm decipiens Diesing. Intestine, also in leopard, 
ounce, etc. Perhaps Bothriocephalus felis Creplin. 
TREMATODES. 
Amphistoma truncatum Rud. 
Distoma lanceolatum Mehilis. Bile ducts ; rare. 
NEMATODES. 
Trichina spiralis Owen. Intestine, young in muscles. 
Dochmius tubeformis Dujadin. Duodenum. 
Ollulanus tricuspis Leuck. Intestine, and young in muscles. 
Ascaris mystax 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. 
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