ILLUSTRATIONS 



[Drawings by Castro with camera lucida outlines.] 



Plate I 



Fig. 1. Echinostoma ilocanum (Garrison), with oral spines. In this spec- 

 imen the vitellaria are not well shown, 

 2. Echinostoma ilocanum (Garrison), without oral spines. 



TEXT FIGURE 



Fig. 1. Outline drawing of anterior end of EchinostomM ilocanum (Garri- 

 son), showing the arrangement of the oral wreath of spines. 



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