40 



ENTOZOA. 



neck are narrow and sharply pointed, but, as regards size, 

 they gradually dwindle down to a mere point or tubercle as our 

 inspection approaches the caudal extremity, where, in point of fact, 



Tig. 13. — EcniNOSTOMA HISPIDDM, Cobhold; from the spiral intestine of the Sturgeon {Acipenser 



sturio). X 15 diam. — Original. 



they become altogether obsolete. In the enlarged figure here 

 given, we obtain a back view of the head and a lateral view of the 

 body, the neck having been partially twisted ; the ventral sucker is 

 concealed, but the semi-transparency of the skin permits a view 



