CESTOID INTESTINAL WORMS. 69 



cules, living, as they do, even iq the mucns contained 

 between the villi of the intestine, endowed with 

 great motility and vivacity, and so numerous that 

 from 20 to 25 of them may be found in a single drop 

 of mucus, must by the irritation which they induce 

 increase the intestinal secretion and the peristaltic 

 action of the bowels. 



Injections, acidulated with nitric acid, appeared 

 to him to be the only means of destroying the para- 

 mecia, and of checking the lienteric diarrhoea which 

 is caused by them. It is probable that the adminis- 

 tration by the mouth of the dilute acids would fulfil 

 the same indication. 



Chapter V. 



THE CESTOID W OEMS FOUND IN THE HUMAN 

 INTESTINES. 



Or the three kinds of cestoid intestinal worms, only 

 two, the taenia solium and the bothriocephalus latus, 

 need occupy our attention, as the third, the taenia 

 nana, has never been observed excepting in Egypt. 



Although there is no complete incompatibility 

 between the two genera referred to above, they 

 usually exist in different countries, and appear almost 

 to exclude one another ; for, generally speaking, in 

 any locality where one of these entozoa is common, 

 the other is not observed or, at any rate, only in very 

 rare cases. 



The bothriocephalus is less widely spread than 

 the taenia, and is found ia limited districts, which are 



