302 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



three accessory suckers, the margins of which I have 

 represented as seen from the side. These are, however, 

 very inconspicuous, and their existence would hardly be 

 suspected except on very careful study of the specimen. 



Fig. 14. 



Calliobothriwn verticillatum, Rudolphi. 

 hooks mae:. 3G6 dia. 



Mag. 132 dia. 



I have not seen them so distinctly shewn as is represented 

 in van Beneden's fig. 3, pi. XII.* The hooks are very 

 characteristic of the species. There are two pairs on the 

 lateral and anterior margins of each bothrium, and each 



* " Vers Cestoides." 



