54 I. IJIMA. 



A number of large branched cells formerly taken for ganglionic cells 

 and lately explained by LoossJ as elements of the connective tissue, are 

 distributed in the mesenchymatous mass, especially in the anterior 

 portion. I have observed besides a number of large cells in the 

 neighborhood of the pharynx. They are probably of a glandular nature. 



The mouth opens on the ventral side at the anterior end. The 

 oral sucker {fig. 1, o.s. ) is slightly larger than the ventral sucker 

 (r. s. ). ]5aelz mentions numerous cuticular hooks as being present in 

 the buccal-cavity, but I did not find any trace of them. 



The cask-shaped muscular pharynx (ph.) is a well-marked organ 

 closely following the oral sucker. The oesophagus (œ.) is very short. 

 Only this portion of the alimentary tube is supplied with circular and 

 longitudinal muscle-fibers on its wall. 



The bifurcation of the intestine occurs a considerable distance in 

 front of the ventral sucker. The blind ends oi intestinal tubes lie near 

 the posterior end of the body. 



The unpaired terminal portion of the excretory vessel (ex.) 

 extends from the minute excretory pore (p. ex.) anteriorly to the 

 region of the seminal receptacle (s. r.), pursuing an irregular course. 

 It runs in the middle of the body, on the dorsal side of the testes. 

 Being a relatively wide canal, it can easily be seen in either fresh or 

 hardened specimens as a transparent streak. I could not distinctly 

 make out the point where this median vessel was continuous with the 

 lateral vessels. The latter can be easily traced in the anterior two thirds 

 of the body. On each side a clear vessel runs anteriorly just outside the 

 intestine. Reaching the height of the point of intestinal bifurcation it 

 turns on itself and traces back its former course posteriorly, its caliber 

 gradually thinning out. I have observed a numbar of ciliated funnels 



Wiirzburg. VII. 



t Die poste mbryonalo Entwickl. der Trematoden Z. f. wiss. Zool. XLIIL 

 X Bcitr. zur Kenntuiss der Trematoden. Z. f. wiss. Zool. XLI. 



