FASCIOLOPSIS 



21 



Fasciolopsis bnski is the largest of the human trematodes. 

 It measures up to 70 mm. in length, but is usually 24 to 

 25 mm. by 5-5 to 12 mm. It is also found in pigs. 



The large size of the acetabulum renders the genus 

 Fasciolopsis easy to identify. The uterus is convoluted 

 and anterior. The intestinal tubes are also sinuous, but 



Ms. 



T. 



T. 



FlG. 8. Fasciolopsis bnski 

 (Lank.). Vs.^ ventral sucker ; Cp. y 

 cirrhus pouch ; /. , intestinal fork ; 

 Sv., vitelline sac; T., testes ; O., 

 ovarium ; Ms., mouth sucker; 

 Shg., shell-gland ; #., uterus. 

 (After Odhner.) 



FlG. 7. Fasciolopsis rathouisi (Poir.). 

 The mouth at the top, and under it the 

 genital pore and ventral sucker, behind 

 which again is the uterus. The vitelline 

 sacs are at the sides, and posteriorly in 

 the central field the ramified testes, the 

 ovary is in front of the right one. 

 (After Glaus.) A re-examination of the 

 types shows that the testes are behind 

 each other, not as in the original descrip- 

 tion from which this figure is taken. 



not branched. The ovary is branched. The testicles 

 also are much branched and placed one behind the 

 other. The vitellaria yolk-glands occupy the edges of 

 the worm throughout nearly the whole of the body- 

 length. 



The intermediate host is not known. The geographi- 

 cal distribution is probably China and India only, as the 

 cases recorded elsewhere, in British Guiana, for instance, 



