CESTODE AND NEMATODE PARASITES. 93 



EXPLANATION OF THE PLATES. 

 PLATE I. 



Fig. 1. Ceplialobothrium aetobatidis. x 10. Entire worm, drawn from preserved specimen. 



,, 2. The head of the same, x about 35. 



3. The head of the same, drawn from life, x about 40. 



,, 4. The head of the same, drawn from life, x about 40. 



5. Anterior end of Hornellobothrium cobraformis, with the suckers expanded, x about 100. 



6. The same, with suckers retracted, x about 100. 



,, 7. Outline of edge of body in anterior broad region. 



,, 8. The same, in the narrower posterior region. 



9. Body of H. cobraformis, x 45, drawn from stained specimen. 



10. Enlarged view of head, x about 450, showing button-like myzorhynchus and the extended 



suckers. 



,, 11. Kystocephalus tmnslucens. x 16. The head in this specimen is rather diagrammatic. 



12. Head of Kystocephalus translucens, x about 50, showing the terminal myzorhynchus. 



13. Myzocephalus narinari. x 10. 



13a. Posterior proglottis. x about 40. 



,, 14. Head of Myzocephalus narinari. x about 40. 



,, 15. The same simplified and opened out to show myzorhynchus. x about 40. Semi-diagrammatic. 



16. a, b, c. Bothridia on myzorhynchus, showing outline of shapes assumed. 



17. Myzophyllobothrium rubrum, x 6. (17.) 



17a. proglottis from the middle of the body, x 25. 



,, 17&. ,, last proglottis. x 25. 



18. ,, head, x 25. 



PLATE II. 



Figs. 19, 20, 21. Myzophyllobothrium rubrum, drawn from living specimens, showing various views of the 



head. The red pigment spots are represented by black dots. 

 Fig. 22. Tetrarhynchus aetobatidis. x 12. 



23. ,, extremity of a proboscis, x about 100. 



24. showing the more sabre-like teeth at the base of the proboscis, and the 



position of the red granules. 



,, 25. Tetrarhynchus, sp. Young form with no proglottides formed, x 40. 



25a. Tip of proboscis, x about 150. 



26. A series of teeth of the above, showing the gradations of a single ring. 



,, 27. Tetrarhynchus, sp. Young form with cyst still present, x about 75. 



27a. Proboscis and teeth of the same. 



28. Tetrarhynchus gangeticus, head, x 20. 



28a. ,, Still further enlarged view of proboscis. 



,, 29. Tetrarhynchus peridemus. x 12. Showing the coiled portion of the body. 



30. the head, x 36. 



,, 30a. More highly magnified view of the proboscis of the same. 



Figs. 31tt, b, c. Three views of proglottides of T. perideneus, showing the modification in the pattern as one 

 passes backward. 



