8 LECTURES. 



hooks, as was also the head of the tapeworm whence 

 I procured those extreme types of segments already 

 brought under your notice. Other minor characters, 

 yet equally distinctive as between the beef and pork 

 varieties, may be seen in the microscopic prepara- 

 tions on the table. 



In the course of practice you may meet with 

 disorders produced both by the larval and adult 

 conditions of the tapeworm. It is true that the 

 first-mentioned cases are extremely rare ; neverthe- 

 less I am confident that they are not so uncommon 

 as is usually supposed. The symptoms produced 

 by larval tapeworms, or cysticerci, in the human 

 body, are liable to be overlooked, especially when 

 these parasites have taken up their residence within 

 the brain. Probably not fewer than one hundred 

 such instances have occurred within medical expe- 

 rience; at all events, fifty such cases have been 

 collected or placed on record by a single author 

 (Gricsinger). It has been shown by these cases 

 that you may have a variety of cerebral symptoms, 

 from simple giddiness and headache up to the most 

 severe and alarming epileptiform seizures, solely 

 brought about by the presence of one or more 

 larval tapeworms in the human brain. It does not 

 appear, indeed, that any of the symptoms are 

 sufficiently characteristic to enable you to dis- 

 tinguish them from mental perturbations caused by 

 other lesions or disorders ; nevertheless, it is just 



