Entozoa {Worms) 293 



flea and the dog louse, hence the necessity for keep- 

 ing a hound's coat as free as possible from these un- 

 desirable visitors, otherwise their host acts, though 

 unwittingly, as a medium for the perpetuation of 

 the worms named. Another common tape- worm 

 is the serrated worm [TcBnia serrata), which attains 

 many feet in length. The larval form of this worm 

 resides in hares and rabbits, hence the objection to 

 allowing sporting dogs to consume the entrails of 

 these animals. TcBuia marginata is another tape- 

 worm infesting the dog; the larval stage of this re- 

 sides in the sheep and pig. There is a small tape- 

 worm, not more than one-third of an inch in length, 

 called TcBnia echinococcus; it is an uncommon 

 parasite in English dogs ; the larval forms of it take 

 up their abode in the hver, lungs, brain, etc., of 

 horses, cattle, sheep, pigs, etc., and such may lead 

 to the host's death. Take, for instance, the hydatid 

 cyst in juxtaposition to the brain; its presence here 

 will cause most serious symptoms, such as a want 

 of co-ordination, etc. Echinococcus disease affects 

 man as well as animals, and this is one reason why 

 it is such a bad plan to fondle dogs, as the eggs of 

 TcBnia echinococcus might be transferred from a dog 

 to a human being through fondling. Hounds are 

 particularly liable to be infected with the serrated 

 tape- worm already alluded to, whilst about 70 per 

 cent, of dogs in general are infested with Tcenia 



