LECTURE XVI. 



The Ascarides properly so-called Lumbrici not common in Eng- 

 land Ascaris mystax still rarer in Man Eggs of the Hound- 

 worm ejected from the Stomach Ascarides common Abroad 

 Symptoms similar to those produced by Oxyurides Singular 

 Habits of Ascaris Jumbricoides Often solitary in this Country 

 Cases LXVI. to LXX. 



GENTLEMEN, I have purposely dwelt thus long on 

 the tapeworms and threadworms because these 

 parasites give rise to diseases respecting which you 

 are sure, sooner or later, to be consulted. If, by 

 way of illustration, I have adduced more cases 

 from my experiences with the tapeworm than with 

 the threadworm class of disorders, it is not because 

 the latter have less frequently come before me in 

 practice, but because the former are more varied 

 in character, and therefore more worthy of study. 

 Some of the rarer kinds of parasitism, indeed, are 

 even more instructive than any of those I have thus 

 far described, but I fear the limits of my available 

 time will not allow me to give to their consideration 

 all the attention they deserve. 



In regard to the ascarides, properly so called, I 

 cannot now enter at any length into the question 



