30 OF THE PRINCIPAL WORMS 



Lecture. It is from these irregular motions of the 

 ^ody of the taenia, here and there compressed by 

 the duplicatures of the intestines, that those knots 

 arc formed in the course of its body, which arc 

 seen when the worin is voided, and which have 

 the appearance of being artificially produced. 

 These knots are sometimes single, sometimes dou~ 

 ble.{44) 



^ XIIT. xVll the taeniae found in the intestines 

 oT man, are not of the same species. 



I cannot however embrace the opinion of those 

 physicians and naturalists, who, admitting as the 

 distinctive character of the taenia, several vague 

 and uncertain marks, have multiplied their species 

 without end, and thus exceeded the bounds of pro- 

 vident nature. 



Hippocrates speaks of one sort of taenia only,(45) 

 and asserts that the maladies hd produces are not 

 always mortal. Physicians since his day have ad- 

 mitted but one species, till the time, of P/afer, who, 

 without distinguishing them, has announced two 

 species. (4(i) 



Andnjy after having examined the two human 

 taeniae, adopted as the specific character of one, 

 the small knots fnoeuds) which traverse the whole 

 length of its body, and which he denominated 

 ike taenia imthoiit thorns, and the other the taenia 

 with thorns, {taenia epineux). (47) 



Bonnet considered this distinction as too gen- 

 eral ; without augmenting their number, but liav- 

 iag regard to the length and smallaess of the a-r- 



