517] 



LARVAL TREMATODES—CORT 



71 



EXPLANATION OF PLATES 



Unless otherwise stated all figures are drawn with a camera lucida. 



The lettering on some toto drawings of the cercariae was omitted by 

 error. The descriptions in the text will be sufficient to make the struc- 

 ture clear. 



ABBREVIATIONS USED 



ab annular bands of muscle 



ac acetabulum 



acr anterior collar of redia 



bp birth pore of redia 



eg cystogenous glands 



ccg cephalic glands 



cm cystogenous material 



cr cercaria in redia 



dc ducts of cephalic glands 



e eye-spot 



es esophagus 



ex excretory system 



exv excretory vessel 



gb germ ball 



* intestinal cecum of cercaria 



ir intestine of redia 



la locomotor appendages of redia 



