BY S. J. JOHNSTON. 309 



pharynx, and cesophagus present ; intestinal limbs reaching 

 to the posterior end of the body. Excretory vesicle V-like, 

 v'ith a very long sfevi and short arms. Genital opening near 

 middle line, just behind fork of intestine, and in front of 

 ventral sucker. Large, rounded testes in the posterior half 

 of the body, one behind the other in the middle line; large 

 rounded ovary, some distance in front of the testes. Copula- 

 tory organs present ; S-shaped rirrus-sac very long, and well 

 developed ; vesicula seminalis constricted in the middle ; 

 Laurer's canal strongly developed, very long and convoluted ; 

 receptaculum seminis doubtful. Vitelline glands extensively 

 developed, laterally placed in the anterior half of the body, 

 but in the posterior half spreading all round the body, close 

 under the surface. Uterus coiuparatively short, except for a 

 very short part of the proximal portion, lying in front of the 

 avary. 



In the intestine of frogs. 



Type: D. trypherus sip.n. 



DOLICHOSACCUS TRYPHERUS, sp.n. 



(Figures 4, 5, 6, 43, 44, 45, 47.) 



Diagnosis. — Small, elongated, delicate worms, about 3 mm. 

 long, becoming gradually narrower towards the ends, and 

 rounded off in front and behind. Integument delicate, spiny ; 

 suckers not far apart ; oral sucker larger than ventral, ratio 

 of oral to ventral 7:5. Excretory vesicle as in the genus. 

 Genital pore just behind the intestinal fork. Testes larger 

 than the ovary, one close behind the other, in the middle of 

 the posterior half of the body. Ovary some distance hehind 

 the vent7-al sucker, to one side of the middle line. Copulatory 

 organs and Laurer's canal as in the genus. Vitelline glands 

 of comparatively small follicles, in front of the ovary not 

 extending inwards beyond the intestinal limbs, and ctnteriorly 



-fmcpepo'i, delicate. 



