108 CEYLON PEARL OYSTER REPORT. 



EXPLANATION OF PLATES. 



PLATE I. 



Fig. 1. EpOdella (Benedenia) macrocolpa, n. sp. Ventral view, x 10. (For letters, see fig. 3.) 

 2. Posterior sucker of the same species, with the three pairs of hooks, x 20. 

 ,, 3. Genital organs of the same species, x 30. 



eg., cerebral ganglion with the two pairs of eyes ; ev. ev. (only in fig. 1), excretory 

 vesicles; ga., genital atrium; ic. ic, intestinal cceca ; hi. In., longitudinal nerve; 

 oot., ootype; on., ovary; p. penis; ph., pharynx; t., testes; ut., uterus; v. vagina; 

 vc, vasa efferentia ; vi. (only in fig. 1), vitellarium ; yd. yd., yolk ducts ; yr., yolk 

 reservoir. 

 4. Stephcmochasmus ceylonicus, n. sp. Ventral view of the living larva after liberation from cyst. 

 (Drawn by James Hornell.) x 24. 



ic., intestinal cceca; ev., excretory vesicle; ex. t, paired diverticula of the excretory 

 vesicle; OS., oral sucker; t., testes ; v.s., ventral sucker. 

 ,, 5. Same. Lateral view of the anterior end. Leitz. Obj. 3, Oc. 3. 



ic, intestinal cceca ; ph., pharynx ; pi:, prsepharynx ; vs., ventral sucker. 

 6. Same. Ventral view of the oral sucker. Leitz. Obj. 5, Oc. 3. 

 Acanihocolpus liodorus, n. gen., n. sp. Ventral view, x 30. 

 Same. Lateral view, x 30. 

 Schistorchis carneus, n. gen., n. sp. Ventral view of the living worm. Natural size. (Drawn by 



James Hornell.) 

 Ventral view of another specimen somewhat squeezed and lying in creosote, x 6. 

 Ventral view of a young specimen containing but a single egg in its uterus, x 10. 



PLATE II. 



Fig. 10. Schistorchis avrtoeus. Ventral view of a specimen lying in alcohol, x 8. 



13. Gastris consors, n. gen., n. sp. Ventral view of an adult specimen lying in alcohol, x i 



14. Ventral view of another specimen somewhat squeezed and lying in creosote, x 10. 



15. Dorsal view of a third specimen squeezed in a similar manner, x 10. 



16. Ventral view of the fourth (young) specimen, x 20. 



17. Anaporrhutum largum, n. sp. Ventral view, x 12. 



18. Distomvm, sp., from Pinna. Lateral view, x 38. 



