1?fi OP THE PRINCIPAL WORMS 



SECOND SPECIES. 



THE UXARMED HUMAN TAENIA. 



§ XIX. The greater number of physicians and 

 yiaiuralists liave given to this worm the name of 

 Taenia lata ;[iO-y) we owe to Bonnet{iOQ} the first 

 accurate description of it. I therefore deem it pro- 

 per to present in this place his own figure of 

 it,fl07) because I find it the bestof all those which 

 niodern times have produced. 



It possesses also the further advantage of being 

 true t(» life. 



§. XX. The external form of the unarmed tae- 

 nia is flat, resembling a riband: its colour is white, 

 which Pallas regards as one of its specific char- 

 acters ;f 108) its ordinary structure is rather coarse, 

 dense or membranous. Its articulations are dis- 

 posed in so peculiar a manner, that it may be clear- 

 ly distinguished with the naked eye from the arm- 

 ed taenia. From the neck, the body is sometimes 

 regularly intersected by transverse margins, not 

 differing from those which unite the joints of the 

 taenia cucurbitina ; from this cause it might at first 

 sight be confounded with the latter, if it were not 

 flat and slender. Such is the flat taenia describ- 

 ed by Marx, and which on account of this singu- 

 larity I submit to the examination of my rea- 

 ders. (t09) In general the joints of the neck are 

 very thin and delicate, being almost imperceptible : 

 those that follow approximate the figure of a square, 

 gradually increasing in width in the body;, and be^ 



