36 



ENTOZOA. 



abound, or even in bread, grain, and fruit. It is more probable, 

 liowever, tliat tlie larvas will be found in gasteropod moUusks 

 proper to the localities from whence tlie adult flukes have been 

 obtained. 



Fig. 12. — GASTEKOSTOiiA oiiACiLESCENS, Wagener ; from the intestines of the Angler (LopMus 

 piscatoriu-s) . X 60 diam. — Original. 



Gasterostoma. — In this singular genus the ventral sucker (Fig. 

 12) seems to have taken the position usually assigned to the 

 oral opening, whilst the latter is placed low down towards the 

 centre of the body. The digestive cceca also disappear, leaving 



