228 S- tJOTo. 



line. Mouth at a, short distance from the fvovd end of the bod}^, 

 slit-Uke, with its length at right angles to the long axis of the body. 

 The anterior rudimentanj sKcJicr very conspicuous in surface view. 

 Fltanjnx ellipsoidal, with the internal tubular cavity coinciding witli 

 the smaller axis. Oesopliagus almost wanting. Tlie two intestinal 

 trunls vnibranched, distinct behind, running ahiiost parallel to the 

 lateral margins cf the body, but each making a slight inward winding 

 at the level of the ovary (at about the end of the anterior third of 

 the whole body), and approaching towards each other at the posterior 

 end just in front of the sucker. Common (jenital opcnintj ventral 

 and median, a little behind the middle of the [interior half of the 

 b(3dy proper. Cliilinous penis exceedingly long and twice bent on 

 itself; with an obliquely cut extremity ; about 0.59 nnn. long. Ocanj 

 situated at the hinder end of the anterior third of the whole 

 body, long, doubled on itself so as to form a loop ^vith its open end 

 directed towards the left side of the body, looping the right intestinal 

 trunk, and with numerous sm.aller convolutions. Ociduct very short, 

 with a portion of it expanded into a small receptacidam scminis. Ootijp 

 of a rliondjic form in longitudinal section. Uterus very short. Vitcl- 

 larium confined to tlie lateral portion of the i)ody outside the intestinal 

 trunks ; consisting of numerous, branching tubules ; and extsnding 

 from the level of the pharynx to that of the posterior sucker. The 

 numerous tubules of the anterior and the postérieur parts of the vitella- 

 rium (jf each side unite am(jno- themselves into a sino-le duct, ^vhich 

 traverses the length of the intestinal trurdc, and just outside this, and 

 uniting with its fellow coming from the opposite direction at the level 

 of the anterior third of the body proper, forms the paired yolk- 

 duct. This then runs straight towards the median line of the body, 

 unites with its fellow of the opposite side, and forms the unpaired yolk- 

 duct^ which is exceedingly short and immediately opens into the 



