INTERNAL PARASITES. (enTOZOA.) 227 



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 inevitably 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 piec ; of carelessness on the part of the 

 keepers, and have ventured to remonstrate accordingly. 



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

 grown rabbits) harbors within its abdominal cavity a larval 

 parasite (Cysticercus pisiformis), which when swallowed by 

 the dog, becomes transformed into a tapeworm, varying from 

 two to three feet in length (Ttsnta serratd). In harriers and 

 greyhounds the serrated tapeworm, is very abundant ; but 

 in other dogs it is comparatively rare. 



" Of the remaining internal parasities infesting the dog, I 

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

 tapeworm {Bothriocephdhcs latus, £. cordatus, B. fuscus, B. 

 reticulatus, and B. dubius^ since, so far as I am aware, only 

 the first-named has been recognized as a canine entozoon in 

 England. 



" I must not omit to mention the arachnidan parasite {Pen- 

 tastoma tcemoides), which, as already stated, is the adult rep- 

 resentative of the Pentastoma dentkulatum, residing in the 

 vicera of the horse, as well as in the internal organs of 

 ruminants. (Fig. 31.) The illustration is from Kiichen- 

 meister. 



" In the full-grown state this creature dwells is the nasal 

 and frontal sinuses, our dogs commonly obtaining the worn 

 by frequenting butchers' stalls and slaughter-rhouses, where 

 portions of the fresh viscera are apt to be inconsiderately 

 flung to hungry animals." 



Professor Dick records a. pase of suspected poisoning in 



