212 JLUNOIS BIOLOGICAL MONOGRAPHS ^ [500 



EXPLANATION OF PLATE 



Fig. 1. Ligula intestinalis, anterior end of larva, showing scolex. 



Fig. 2. Ligula intestinalis, anterior end of adult. 



Fig. 3. Schistocephalus solidus, anterior end of larva. 



Fig. 4. Marsipometra hastata, scolex, surfidal view. 



Fig. 5. Marsipometra hastata, same specimen, lateral view. 



Fig. 6. Bothrinwnus intermedius, scolex, surficial \'iew. 



Fig. 7. Bothfitncnus intermedius, same specimen, lateral view. 



Fig. 8. Botkrimonus intermedius, same Sf>ecimen, terminal view. 



Fig. 9. Baplobothrium globuliforme, secondary scolex, surficial view. 



Fig. 10. Baplobothrium globuliforme, same specimen, lateral view. 



Fig. 11. Cyathocephalus americanus, scolex, toto preparation. 



Fig. 12. Triaenophorus, larva, robustus type, surficial view. 



Fig. 13. Triaenophorus, same specimen, lateral view. 



Fig. 14. Triaenophorus, same specimen, one of the tridents of hooks. 



Fig. 15. Triaenophorus, larva, nodulosus type, surficial view. 



Fig. 16. Triaenophorus, same specimen, lateral view. 



Fig. 17. Triaenophorus, same specimen, a trident, terminal view. 



Fig. 18. Triaenophorus, same specimen, surficial view. 



Fig. 19. Bothriocephalus daviceps from Eupomotis gibbosus, scolex, surficial view. 



Fig. 20. Bothriocephalus daviceps, same specimen, lateral view. 



Fig. 21. Bothriocephalus scorpii, scolex, surficial view. 



Fig. 22. Bothriocephalus scorpii, same sp>ecimen, lateral view. 



Fig. 23. Bothriocephalus daviceps {toto. AnguiUa rostrata, scolex, surficial view. 



Fig. 24. Bothriocephalus cuspidatus, scolex, surficial view. 



Fig. 25. Bothriocephalus cuspidatus, same specimen, lateral view. 



Fig. 26. Bothriocephalus manubriformis, scolex, surficial view. 



Fig. 27. Bothriocephalus manubriformis, same specimen, lateral view. 



Fig. 28. Bothriocephalus occidentalis, scolex. After Linton. 



Fig. 29. Clestobothrium crassiceps, scolex, surficial \-iew. 



Fig. 30. Clestobothrium crassiceps, same specimen, lateral view. 



Fig. 31. Clestobothrium crassiceps, same specimen, terminal view. 



Fig. 32. A bothrium rugosum , scolex of yoimg strobila. 



Fig. 33. A bothrium rugosum, later stage in degeneration of same. 



Fig. 34. Abothrium rugosum, stiU later stage. 



Fig. 35. A bothrium rugosum, pseudoscolex from lumen of pyloric coecum of host. 



Fig. 36. Abothrium rugosum, pseudoscolex from wall of coecum. 



Fig. 37. Abothrium crassum, scolex from Cristivomer namaycush. 



Fig. 38. Abothrium crassum, enlarged scolex from Lota maculosa. 



