TWO NEW TREMATODES. §53 



available for comparison. Following the pharynx, a,nd fibovit as 

 long as it, is a wide oesophagus, which bifiu'categ £i.bQVit naidwp,^ 

 between the pharynx and the ventral suckgr. The diverticvila p,rp 

 fairly uniform, but become somewhat sinuqus towards tjieir ter- 

 mination, which is "45 mm. fi'om the end of the body. 



The excretory vesicle is Y-shaped, with a long medip,n stem 

 reaching the middle of the body and two short limbs, the left of 

 which extends as far forward as the left testis, Owing to the 

 fact that sections could not be made, it wag impossible to determine 

 whether Odhner's view with regard to the shape of the exci^etory 

 vesicle in the Dicrocoeliidte holds good in this case. To all 

 appearance, however, the paired Hmbs are paft of the vesicle. 

 Their walls stand out as distinctly, and p,re about tbe game 

 thickness, as those of the main steni, 



The testes lie not far behind the ventral sucker, They are two 

 transversely oval bodies, separated from each other by a distance 

 equal to their di^-meter, They aj-e situated obliquely, the right 

 being about half a diameter in advance of the left, and being 

 separated from the ventral sucker by a similar distance. They 

 measure '31 mm, in transverse diameter, The pirrus^pouch is of 

 small size and lies entirely in front of the ventral sucjcei'. It 

 measures '29 x *13 mm., and contains a small convoluted vesiculfv 

 seminalis, a comparatively long pars prostatica, and a short n,arrow 

 ductus ejaculatorins, The genital aperture is median, just over 

 the intestinal bifui'cation. 



The ovary lies a considerable distginpe behind the testeg, about 

 midway between them and the end of the body, It is op thp 

 right side overlying the right intestinal diverticulum. Its outline 

 is transversely oval and it is much larger than the testes, 

 measuring '31 X "47 mm. There appears to be no receptaculum 

 seminis, or if present it is obscured by the uterus, The yolk- 

 glands are situated chiefly in the neck, the sides of which they 

 almost completely fill. They extend on each side fropi the oral 

 sucker to well behind the ventral sucker, biit they ai'e more ex-. 

 tensive on the left than on the right. On the right they stop at 

 the level of the bifurcation of the excretory vesicle, althopgh 

 there are a couple of small fpUiples near the ova,ry. On the left 

 they extend slightly beyond the level of the ovary.. In the neefc 

 the follicles spread well in tow3.rds the midrline of the body, but 

 behind the ventral supker they lie entirely to the outer side of the 

 intestinal diverticula. The trangverse yollv-ductg cross the body 

 about the level of the testes, and the shell-gland lies ju^t behinicl 

 the right testis, 



The uterus is moderately volupiinous and is thrown into 

 irregular narrow convolntions. It does not extend much bphind 

 the ovary, but in front it overlaps the intestinal diverticula, and 

 winding between the testes it passes forward on the left side of 

 the ventral sucker anxi make*; a few short turns in front of the 

 sucker before passing into the short vagina. The eggs are small 

 and numerous, measuring •036-'039 x •018-"019 mm. 



Proc. Zool. 8uc.— 1912. Ko. LYTI. 57 



