I. IYER niSïOME. 



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Explanation of plate X. 

 Reference letters: 



a. T. — Anterior testis (left testicle). 



C. lat. — Lateral canal of excretory organ. 



C. M. — Circular muscle. 



Int. — Intestine. 



L. C — Laurer's canal. 



L. M. — Longitudinal muscle. 



Oes. — (Esophagus. 



o. S. — Oral sucker. 



Ov. — Ovary. 



P. Gen. — Genital aperture. 



Phar. — Pharynx. 



R. sem. — Seminal receptacle. 



p. T. — Posterior testis (right testicle . 



Sp. — Spine. 



Ut. — Uterus. 



V. ex. — Terminal vessel of excretory organ. 



Vit. — Vitellarium. 



V. sem. — Seminal vesicle. 



v. S. — Ventral sucker. 



Fig. I. Photograph of the encysted distome from the muscle of 



Pseudorasbora parva, fixed with heat ; somewhat flattened 



by pressure. Enlargement ca. 400. 

 Fig. 2. Encysted distome : ventral aspect of a specimen freed 



from the cyst ; half diagrammatic. Enlargement ca. 200. 

 Fig. 3. A part of the skin of Clonorchis endemicus, at the level 



of the pharynx. Specimen obtained from a cat 22 days 



after infection. Enlargement ca. 600. 

 Fig. 4. Ventral aspect of a mature Clonorchis endemicus. Specimen 



obtained from a cat 26 days after infection. Enlargement 



ca. 30. 



