442 



ENT0250A. 



DESCEIPTION OF AN INTESTINAL WOEM EROM THE 



DUODENUM OE THE WHITE EISH OE THE 



CANADIAN LAKES. 



BT BETEEIiET E. MOEEIS, A.B., M.D. 



Read before the Canadian Institute, 22th January, 1859. 



ENTOZOA. 



PAEENCHTMATA. 



Fam. : Aeanthocephala. Genus : EcHnorhynclius. 

 Species : ? 



Description. — Body cylindrical, tapering to the tail. Precis sub- 

 globular, flattened anteriorly, armed with numerous recurved hooks, 

 very difficult to count, but probably not exceeding twelve in number. 

 Neck distinct nearly as long as the width of the tail. Digestive 

 pouch doubly sacculated for half its length, which equals half the 

 length of the whole body. 



Colour — pale brownish yellow. 



Length — one-fifth of an inch. 



I found three specimens of this parasite adhering to the duodenal 

 portion of the intestinal canal of a White Eish {Garegonus alius) of 

 about two pounds weight, on the 5th of December, 1856. They were 

 dead and partially decomposed, which rendered the examination less 

 satisfactory than it would have been had they been alive. The form. 



I"iK. 3. 



Fig, 2. 



as well as the arrangement of the hooka (Fig. 2) is curious and is 

 only to be seen by careful focussing when under the miscroscope. 



