OUR DOMESTICATED ANIMALS. 109 



common in the human subject. They are also described 

 in the work by " Stonehenge " on the " Management of 

 Dogs " (p. 15). I must therefore particularly explain 

 that these misnamed maw-worms are merely the semi- 

 independent segments or proglottides of two of the 

 larger species of tapeworm which infest the dog, namely, 

 Tcenia margined a and Taenia serrata. 



It follows, therefore, that the treatment for this 

 common kennel worm is the same as that for the tape- 

 worm, seeing that it is only a cast-off portion of the self- 

 same entozoon. Areca-nut powder is the best remedy ; 

 but male fern may be sometimes substituted with advan- 

 tage. 



I may add that when santonine is employed for any of 

 the round worms, it should always be combined with a 

 purgative if it is to prove effective. For this purpose 

 nothing is ordinarily better than castor-oil ; but twenty 

 or thirty grains of aloes may be employed instead of the 

 oil in obstinate cases. In the latter case a few grains of 

 ginger should be added to prevent griping. 



Parasites of the Horse. — Although the parasites of the 

 horse and ass are sufficiently numerous as species, their 

 importance in relation to disease in these animals is, 

 speaking generally, far less than that which obtains in 

 the case of other domesticated animals similarly affected. 



Herein lies the reason why so few veterinarians think 

 the study of the entozoa worthy of their regard. If 

 questioned, they would perhaps say, in effect : The tape- 

 worms of the horse (Tcenia mammillana, T. perfoliata, 

 and T. plicata) are insignificant as regards size (Fig. 25 ; 

 altered from Groeze),and the symptoms they create are of 

 little or no consequence. The large round worms (Ascaris 

 megalocephala) , though occasionally present in great 



