578 



TREMATODA 



posterior lobate. The ovary is slightly lobate, and it and the uterus are 

 situated medianly. The yolk glands lie laterally in the middle third, extend- 

 ing from behind the ventral sucker to the back of the testes. There is no 

 cirrus pouch. The eggs are oval (0-034 by 0-021 millimetre). 



Habitat. — The dog and man. 

 Pathogenicity. — ^Not known. 



CIonorchisLooss, 1907. 



Definition. — -Opisthorchiinae characterized by the fact that the 

 testes are not notched or lobate, but distinctly ramified, the branches 

 crossing the intestinal caeca on their ventral side and extending very 

 near the body margin. The excretory vesicle is simply an unpaired 



Fig. 223. — Clonorchis sinensis. Fig. 224. — Clonorchis endemicus. 



(After Looss, from the Annals of (After Looss, from the /4«wa/s 0/ 



Tropical Medicine and Parasitology.) Tropical Medicine and Parasitology,) 



a, Schematic; b, natural size; c, egg a, Schematic; h, natural size; c, egg 



X 500. X 500- 



i^i^'Species.^ — Clonorchis sinensis Cobbold, 1875 ; Clonorchis endemicus 

 Baelz, 1883; but the work of Kobayashi in 1917 tends to show 

 that they are one and the same species. 



Clonorchis sinensis Cobbold, 1875, 

 Synonyms. — Distoma sinense Cobbbld, 1875; D. spathulatum 

 Leuckart, 1876; Distomum hepatis innocuum Baelz, 1883. 

 Definition. — (Clonorchis with the generic characters. 



