hiternal Parasites. 233 



■copies from figures given in my general treatise on 



•entozoa. 



"It is a fortunate circumstance that this destructive little 



1:apeworm is comparatively rare in England. It is the 



-smallest cestode infesting the dog, and the one most likely 

 to be overlooked. 



" Every year, notwithstanding its rarity, this little canine 

 entozoon, by means of its larvae, claims the lives of scores, 



-or it may be hundreds of persons in this country ; but, with 

 all England's wealth, I do not suppose a dozen people could 

 be found who would be prepared to sacrifice a few pounds 



•each for the purpose of promoting an investigation, the re- 

 sults of which would be eminently conducive to public 

 health, and most certainly help to diminish our annual 

 mortality. At the same time such a research would inevit- 

 ably tend to lessen the amount of, if it did not altogether 

 put an end to, at least one frequent form of parasitism 



-affecting our domesticated animals. 



" Sportsmen who care for the welfare of their dogs should 

 never allow these animals to devour the entrails of hares 

 captured in the field. In the county of Norfolk I have 

 myself witnessed this piece of carelessness on the part of 

 keepers and have ventured to remonstrate accordingly. 



" Almost every hare (and the same may be said of full- 

 grown rabbits) harbours within its abdominal cavity a larval 

 parasite {Cysticercus fisiformis), which, when swallowed by 

 the dog, becomes transformed into a tapeworm, varying 

 from two to three feet in length (Tania serrata.) In 

 harriers and greyhounds the serrated tapeworm is very 



-abundant ; but in other dogs it is comparatively rare. 



" Of the remaining internal parasites infesting the dog 

 I need only allude to several species and varieties of pit- 

 headed tapeworm {Bothriocephalus latus, B. cordatus, B- 



fuscus, B. reticulatus and B. dubius), since so , far as I am 

 aware only the first-named has been recognised as a canine 



.entozoon in England. 



" I must not omit to mention the arachnidan parasite 



