CONTENTS. 



Pa?e. 



Historical account 113 



Description of scolex. cyst and lilastocyst 11-1 



Distribution and number of cysts in butterfish ._ 115 



Details of examinations of l)Utterfish for cysts 1 Iti 



Habitats of the parasite 122 



Adult stage - - 122 



Encysted stage 122 



Effect of the presence of cysts on weight of host 125 



Life history of the parasite 126 



Special case of buttci'fish and hammerhead shark 127 



Food of hammerhead shark 127 



Food of butterfish 127 



Economic considerations 128 



Problems suggestc>d 1 30 



Explanation of plates 131 



112 



