PARASITES OF ANIMALS. 51 



The same species, or one very closely allied to it, occurs in 

 the skin of the dog and other domestic animals, producing 

 some forms of the " mange." These parasites will probably 

 be destroyed by the same remedies that are effective against 

 the itch-insect. 



Library. 



SECOND LECTURE 



The Internal Parasites of Domestic Animals; 



THEIR EFFECTS AND REMEDIES: 



The parasites of man are so intimately connected with those 

 of his domesticated animals, that it is impossible to discuss 

 them separately. Indeed, many of the human parasites in- 

 habit also the hog, cattle, sheep, and the dog, in certain stages 

 of their development, and nearly all the most dangerous kinds 

 are derived, either directly or indirectly, from those animals. 

 While in return mankind furnish to them the eggs of several 



