OF THE HUMAN BODY. ^ 



of the worm to be at its anterior filamentous ex- 

 tremity, which serves as a neck. 



In the opposite extremity terminates the intes- 

 tinal tube, and for this reason, it should be regard- 

 ed as the tail of the tricocephalus. 



§ XXXIII. The tricocephali which are found 

 in the iutestiaes of men are of different sexes. 



Tlie tail of the male is turned round in a spiral 

 form ; while that of the female, on the contrary, is 

 oblong and flat, like that of the beaver, larger than 

 the body and bent.(l60) 



We discover the internal organization of the 

 male of this worm by opening it and subjecting it 

 to the microscope. It is provided with an alimen- 

 tary and intestinal tube, and with spermatic ves- 

 sels. (I6l) The tube of this worm, according to nat- 

 uralists, may appear externally :(15S) may it not 

 constitute one of the parts of generation ? 



The female tricocephalus has not in fact this 

 tube, or cylindrical invagiuated body, which some 

 authors have given it ; it is the end of its tail which 

 is quite obtuse. (163) Besides the intestinal canal, 

 its ovaries, so well described by Midler, [iQ\) may 

 be easily seen ; they are filled with a great quanti- 

 ty of eggs, which Wagler has observed(l65) to be 

 deposited by means of a particular canal. 



These eggs, deposited by the female,(l66) are of 

 an oval figure, and pointed at botli extremities, lu 

 the male not the least trace of them is seen. 



^ XXXIV. Pallas has described a tricocepha- 

 lus which he found in the intestines of the Lacerta 



