CLONORCHIS ENDEMICUS 



259 



Vd. 



Dst. 



0*49 mm. in transverse diameter. In the parenchyma numerous 

 yellowish or brownish granules, especially behind the oral sucker and 

 at the posterior end. Testicular branches very long, in the anterior 

 testis often four, in the posterior testis five branches. Ovary generally 

 with three large lobes and a smaller lobe. Vitellaria not always sym- 

 metrical, generally extending laterally from the ventral sucker to the 

 ovary, interrupted in parts. 



Eggs 26 //, to 30 p by 15 fju to 17 IJL. 

 Average 29 //, by 16 p. 



This (?) species was discovered in 1874 

 by McConnell, in Calcutta, in the bile-ducts 

 of a Chinaman who died shortly after being 

 admitted into hospital. 



Habitat. Bile-ducts of man, dog and cat. 



Distribution. Especially in China, ap- 

 parently rare in Japan. 



Clonorchis endemicus, Baelz, 1883. 



Syn. : Disloma sinense s. spathulatum p.p. ; 

 Distoma hepatis endemicum s. perniciosum, Baelz, 

 1883; Distoma japonicum, R. Blanchard, 1886. 



Very similar to the previous species and 

 consequently generally confused with it. 

 Length between 6 and 13 mm., width 

 varying between 1*8 and 2'6 mm. Oral 

 sucker 0*37 to 0*5 mm., usually 0*43 to 

 0*45 mm. in transverse diameter ; ventral 

 sucker 0*33 to 0*45 mm., usually 0*37 to 

 0*40 mm. No pigment in parenchyma ; 

 anterior testis with four, posterior testis with 

 five branches. Vitellaria continuous, ova 

 26 IJL by 13 IJL to 16 fji. 



Habitat. Bile-ducts of man, dog, cat 

 and pig. 



H. 



FIG. 158. Clonorchis sinensis. 

 C.L. t Laurer's canal ; Dst., vitel- 

 laria ; x., excretory bladder; 

 H., testes ; K.> ovary ; R.S., re- 

 ceptaculum seminis ; Vd. t ter- 

 minal section of vas deferens. 

 Magnified 4^ times. (After 

 Looss.) 



FIG. 159. Ova of Clonorchis sinensis. The knobs on the ends of 

 the eggs are not shown. 900/1. (After Looss.) 



