'Jf^ 



S. GOTO 



Explanation of Plates. 



Abbreviations common to all the figures. 



ant. suck anterior sucker. 



hr brain. 



hid. ej bulbus ejaculatorius. 



cci7i.ge.iiit canalis genito-intestinalis. 



chit cbitinons piece or framework of the sucker. 



cir. mils circular mnsele. 



iVkkj. mils diagonal muscle. 



due. ej ductus ejaculatorius. 



rf. V. mils dorso-ventral muscle. 



ej\ op excretory opening. 



ex. c. m external circular muscle. 



ex. sac terminal excretory sac. 



ex. ves excretory vessel. 



fjen. op genital opening. 



int intestine. 



int. c intestinal cell. 



int. c. m internal circular muscle. 



I- miis longitudinal muscle. 



mes. c mesenchyma cell. 



mes. n mesenchyma nucleus. 



mils muscle. 



nerv nerve. 



i^erv. c nerve-cell. 



oesojih oesojphagus. 



oot ootyp. 



'•"' ovary. 



onl oviduct. 



l"n penis. 



pe^i chituious penis. 



