HUMAN WORMS. 105 



human Taenia cucurbitina ; differing from it only 

 in some singularities, by no means characteristic. 



The same may be said of the short tailed tae- 

 nia, found in cats. Its articnlatio^is, according to 

 Bloch^s figure,(20) in the middle of the body, can 

 hardly be distinguished from those of a human tae- 

 nia cucuiliitina, somewhat advanced in age.(21) 



In fact^ Pallas' 211) considers both as belon". 

 ing to the same species, and he attributes to tlie 

 diversity of food merely, the difference noticeable in 

 their articulations. 



In the anitra clangula and the anitra fuligola, 

 we observe a taenia, which Block calls taenia artic- 

 ulis conoUeis,{2S) whose external form, excepting 

 the tail, differs in nothing from the young human 

 taenia cucurbitina, particularly from that represents 

 ed in plate I, figure ii. 



Sheep are very subject to worms, because of 

 tlicir feeble and lax fibre, and have a constitution- 

 al tendency to diseases of debility ; they are often 

 tormented by a sort of taenia, which has been de- 

 nominated Taenia vasis nutriciis distincta.{C^) 

 Its exterior form has great resemblance to the broad 

 human taenia. 



§ LXIII. We have already remarked that men 

 and other animals are likewise exposed to vesic- 

 ular worms/25) The difference however which 

 exists between the human vesicular worms and 

 these of animals, seems to be essential ;(26) it must 



however be acknowledged that the history of these 

 14 



