.\o. 6 gilbert: three xf.w trematodes 103 



EXPLANATION OF PLATES 



All figures were drawn with the aid of a camera lucida or projector. The value 

 of the projected scale is indicated in each figure. The following abbreviations are 

 used: 



cir cirrus 



cs cirrus sac 



ej ejaculatory duct 



rp excretory pore 



c.\ excretory vesicle 



glc gland cells 



gp - genital pore 



Im longitudinal muscles 



mt met ra term 



pes posterior portion of cirrus sac 



pp pars prostatica 



sv — - seminal vesicle 



ut uterus 



