214 S. GOTO. 



the four suckers of each side equidistant from each other, and those 

 belonging to the last pair separated from each other slightly more than 

 those of the same side are from each other. Oesophagus almost wanting. 

 The two intestinal trunhs sending lateral branches outwards, and 

 connected with each other by sparsely anastomosing commissures only in 

 the anterior, fusiform portion of the body ; in the stalk-like portion the 

 two trunks also send out short lateral branches but run paralled to each 

 other and remain wholly separate up to their terminations between the 

 last pair of suckers. Common genital opening close behind the begin- 

 ning of the intestine. Penis with ten hooks. Ocary comparatively 

 small, occupying the median part of the body in the anterior half of 

 the last third of the fusiform portion ; when viewed from the ventral 

 side somewhat like two commas placed obliquely one above the other, 

 with the upper one more to the right. Ooiduct arising from the en- 

 larged head of the anterior half of the ovary and thence proceeding 

 backwards and slightly towards the right as far as the posterior end 

 of the ovary, bends slightly towards the left, keeping its backward 

 course, and reaching the front end of the testes in the median line, 

 suddenly bends forwards and is continued into the ootyp. Vitellaria 

 of the two sides distinct both in front and behind ; absent from the 

 stalk-like portion. Paired yolk-ducts symmetrical, uniting with each 

 other at about the hinder end of the foremost third of the whole 

 body, dorsally to the uterus. The unpaired yolk-duct thence proceeds 

 backwards and slightly towards the right, and reaching the level of the 

 middle of the ovary, turns slightly towards the left, and reaching the 

 level of the front end of the testes, bends rather sharply towards the 

 right, and opens into the oviduct a short distance in front of the point 

 where the latter bends forwards to meet the ootyp. From this the 

 uterus proceeds forwards, and its anterior part sometimes contains 

 numerous eggs, in consequence of which it is greatly enlarged and 



