Plate III.
Fig. 1. Terminal genitalia of Tetrancistrum sigani Goto et Kikuchi, 1917; dorsal view.
Fig. 2. Ancyrocephaloides triacanthi n. g., n. sp.; ventral view.
Fig. 3. Parancyrocephaloides daicoci n. g., n. sp.; ventral view.
Fig. 4. Adhesive apparatus at posterior extremity of Parancyrocephaloides daicoci; ventral view.
Fig. 5. Terminal genitalia of Parancyrocephaloides daicoci; ventral view.
Fig. 6. Diplectanum epinepheli n. sp.; ventral view.
Fig. 7. Genital ducts of Diplectanum epinepheli; ventral view.
Fig. 8. Discocotyle dorosomatis n. sp.; ventral view.
Fig. 9. Framework of posterior sucker of Discocotyle dorosomatis; ventral view.
Fig. 10. Hook bearing caudal lobe of Discocotyle dorosomatis; ventral view.
Plate IV.
Fig. 11. Terminal genitalia of Discocotyle dorosomatis; ventral view.
Fig. 12. Pseudoctocotyla dorosomatis n. g., n. sp.; ventral view.
Fig. 13. Framework of posterior sucker of Pseudoctocotyla dorosomatis; ventral view.
Fig. 14. Terminal genitalia of Pseudoctocotyla dorosomatis; ventral view.
Fig. 15. Posterior sucker of Piclidophora elongata Goto, 1894; ventral view.
Fig. 16. Egg of Diclidophora elongata Goto.
Fig. 17. Posterior sucker of Cyclobothrium sessilis (Goto); ventral view.
Fig. 18. Cyclobothrium semicossyphi n. sp.; ventral view.
Fig. 19. Rajoncocotyle kenojei n. sp.; ventral view.
Fig. 20. Microcotyle tai n. sp.; ventral view.
Plate V.
Fig. 21. Framework of posterior sucker of Microcotyle tai.
Fig. 22. Vagina of Microcotyle tai.
Fig. 23. Anterior part of Microcotyle mugilis Vogt, 1878.
Fig. 24. Framework of posterior sucker of Microcotyle mugilis Vogt.
Fig. 25. Thoracocotyle coryphaenae ; ventral view.
Fig. 26. Framework of posterior sucker of Thoracocotyle coryphaenae.
Fig. 27. Axine (Axine) constricta n: sp.; ventral view.
Fig. 28. Framework of posterior sucker of Axine (Axine) constricta.
Fig. 29. Terminal genitalia of Axine (Axine) constricta.
Fig. 30. Vagina of Axine (Axine) constricta.
Fig. 31. Axine (Axinoides) tylosuri n. sp.; ventral view.
Fig. 32. Framework of posterior sucker of Axine (Axinoides) tylosuri.
Fig. 33. Terminal genitalia of Axine (Axinoides) tylosuri; ventral view.
Fig. 34. Vagina and its accessories of Axine (Axinoides) tylosuri.
Plate VI.
Fig. 35. Framework of posterior suckers of Pseudaxine trachuri Parona et Perugia.
Fig. 36. Caudal hooks of Pseudaxine trachuri Parona et Perugia.
Fig. 37. Framework of posterior sucker of Gastrocotyle trachuri van Ben. et Hesse, 1863.
Fig. 38. Egg of Gastrocotyle trachuri.
Fig. 39. Hirudinella spinulosa n. sp.; ventral view.
Fig. 40. Bathycotyle coryphaenae n. sp.; lateral view.
Fig. 41. Didymozoon brevicolle n. sp.; ventral view. Uterus omitted for hindbody.
Fig. 42. Didymozoon branchiale n. sp.; ventral view.
Fig. 43. Didymozoon spirale n. sp.; forebody in ventral view; hindbody in lateral view, without uterus.
Plate VII.
Fig. 44. Didymozoon koti n. sp.; ventral view.
Fig. 45. Didymocystis alalongae n. sp.; dorsal view.
Fig. 46. Didymocystis opercularis n. sp.; dorsal view.
Fig. 47. Didymocystis abdominalis n. sp.; ventral view.
Plate VIII.
Fig. 48. Didymocystis submentalis n. sp.; lateral view. Uterus omitted for hindbody.
Fig. 49. Type cyst of Didymocystis dissimilis n. sp. containing two worms, lateral view.
Uterus omitted.
Fig. 50. Paratype of Didymocystis dissimilis; ventral view.
Fig. 51. Didymocystis acanthocybii n. sp.; lateral view. Uterus omitted for hindbody.
Fig. 52. Didymocystis miliaris n. sp.; dorsal view.
Fig. 53. Platocystis alalongae n. g., n. sp.; forebody in dorsal view, hindbody in lateral view.
Fig. 54. Male of Coeliotrema thynni n. g., n. sp.; forebody in ventral view, hindbody in lateral view.
Fig. 55. Diplotrema pelamydis n. g., n. sp.; lateral view.
Plate IX.
Fig. 56.　Coeliotrema thynni, unfolded; ventral view. FFB female forebody, MFB male forebody, MHB male hindbody.
Fig. 57. Anterior part of Metanematobothrium guernei (Moniez, 1891); ventral view.
Fig. 58. Posterior part of Metanematobothrium guernei (Moniez); ventral view.
Fig. 59. Genital junction of Metanematobothrium guernei (Moniez).
Fig. 60. Anterior part of male of Gonapodasmius pristipomatis (Yamaguti, 1934); ventral view.
Fig. 61. Posterior part of male of Gonapodasmius pristipomatis (Yamaguti); ventral view.
Fig. 62. Anterior part of female of Gonapodasmius pristipomatis (Yamaguti); ventral view.
Fig. 63. Posterior part of female of Gonapodasmius pristipomatis (Yamaguti); lateral view.
Fig. 64. Anterior part of male of Gonapodasmius pacificus n. sp.; ventral view.
Fig. 65. Posterior part of male of Gonapodasmius pacificus; ventral view.
Plate X.
Fig. 66. Anterior part of female of Gonapodasmius pacificus; ventral view.
Fig. 67. Posterior part of female of Gonapodasmius pacificus; lateral view.
Fig. 68. Shell gland region of female of Gonapodasmius pacificus; ventral view.
Fig. 69. Anterior part of male of Paragonapodasmius managatuwo n. g., n. sp.; ventral view.
Fig. 70. Posterior part of male of Paragonapodasmius managatuwo; ventral view.
Fig. 71. Anterior part of female of Paragonapodasmius managatuwo; ventral view.
Fig. 72. Posterior part of female of Paragonapodasmius managatuwo; ventral view.
Fig. 73. Shell gland region of female of Paragonapodasmius managatuwo; ventral view.
Fig. 74. Syncoelium katuwo n. sp.; lateral view.
Plate XI.
Figs. 75-77. Hirudinella spinulosa n. sp. Fig. 75. Transverse section of body wall; 1 layer of cuticular spines, 2 layer of epidermal cells, 3 layer of elastic fibers, 4 layer of large polygonal cells, 5 layer of longitudinal muscles, 6 layer of spindle-shaped cells corresponding to subcuticular cells of other trematodes. ×140., Fig. 76. Transverse section through genital bulb; a genital atrium, de ductus ejaculatorius, i intestine, * genital papilla.×50., Fig. 77. Transverse section showing connection between two ceca. ×25.
Fig. 78. Gill of Thynnus alalonga with 8 cysts of Didymocystis alalongae.
Fig. 79. Cyst of Didymocystis opercularis.
Fig. 80. Cysts of Didymocystis abdominalis in mesenterium of Euthynnus pelamys. c cyst, i intestine, m mesenterium.
Fig. 81. Transverse section of Didymocystis dissimilis,×50. f base of forebody, i intestine, o ovary, p pharynx, r uterine reservoir, u uterus, vt vitellaria.
Fig. 82. Cyst of Platocystis alalongae in skin of Thynnus alalonga.
Fig. 83. Transverse section of Coeliotrema thynni through receptaculum seminis, ×25. f forebody, i intestine, t testis, vt vitellaria.
Fig. 84. Diplotrema pelamydis attached to fifth gill of Euthynnus pelamys.
Figs. 85-88. Transverse sections of Diplotrema pelamydis. d vas deferens, f forebody, i intestine, o ovary, rs receptaculum seminis, u uterus, v excretory vesicle, vt vitellaria. Fig. 85. Through point of turning of anterior cecum, ×50., Fig. 86. Through base of forebody. ×35. f forebody., Fig. 87. Through receptaculum seminis, ×50., Fig.88. Through vitellarian zone, ×50.