R. Kudo 
243 
PLATE XVI. 
Fig. 51. A fresh trophozoite with one vegetative nucleus and eight generative nuclei. P. 
Fig. 52. A trophozoite at a later stage. P.Tns.Sa.G. 
tig. 53. A trophozoite showing a vegetative nucleus and twelve generative nuclei which are 
arranged in two groups. In each group, two capsulogenous cells, two sporoplasms and two 
valve cells are seen. C.Tns.Sa.G. 
Fig. 54. A more advanced stage. C.Tns.Sa.G. 
tig 55. A fresh trophozoite at an almost similar stage of the development to the last. P. 
Fig 50. A more developed form. P.Tns.Sa.G. 
PLATE XVII. 
Fig. 57. A trophozoite greatly spread out in the smear. C.Sa.G. 
Fig. 58. Another trophozoite. C.Tns.Sa.G. 
Fig. 59. A trophozoite with two more advanced spores. P.Tns.Sa.G. 
lig. 00. A trophozoite with two spores in which the formation of polar filaments is clearly 
observable. C Tns.Sa.G. 
Figs. 01-07. \oung spores at various stages of development, the rest of the body of the tropho¬ 
zoites are not shown. C.Tns.Sa.G. 
PLATE XVIII. 
Figs. 08-/0. More advanced stages in the spore formation. C.Tns.Sa.G. 
big. 71. A section through a trophozoite attached to an epithelial cell of the host tubule. This 
section showed only one of the spores and the vegetative nucleus. C.S.Sa.H. 
Figs. 72, 73. Young spores, one showing the formation of polar filaments. C.S.F.H. 
Fig. 74. A young spore. C.S.Sa.H. 
Fig. 75. A spore showing foramina for the polar filaments. P.Tns.B.D. 
Fig. 70. A spore. C.S.Sa.H. 
Figs. 77, 78. Two different end views of a young spore. P.Tns.Sa.G. 
ligs. 79, 80. Tangential sections through the anterior region of spores, showing the foramina 
of polar filaments in front view. C.S.Sa.H. 
lig. 81. A trophozoite with two mature spores of normal size. P.Tns.Sa.H. 
Fig. 82. A trophozoite with two deeply stained spores of normal size. P.Tns.Sa.G.. 
PLATE XIX. 
Fig. 83. A trophozoite with two spores of much smaller size. P.Tns.Sa.G. 
Fig. 84. A trophozoite with a normal mature spore and an abnormal spore with three polar 
capsules under formation. P.Tns.Sa.G. 
Fig. 85. A trophozoite with a mature spore of somewhat smaller size and a generative nucleus 
whose division has so far not taken place. P.Tns.Sa.G. 
Fig. 80. A monosporous trophozoite. P.Tns.Sa.G. 
tig. 87. A fresh disporous trophozoite. C. 
Fig. 88. A fresh disporous trophozoite. P. 
Fig. 89. A fresh disporous trophozoite showing pseudopodia. P. 
tig. 90. Optical section of a normal spore in the fresh state. P. 
tigs. 91—93. Two surface views (tigs. 91, 93) and an optical section (Fig. 92) of an empty spore 
. membrane in the fresh state. P. 
tigs. 94, 95. Optical section and the upper surface view of a spore of somewhat larger dimensions 
• 
PLATE XX. 
Figs. 90, 97. Fresh spores. C. 
Fig. 98. A fresh spore of smaller dimensions. C. 
Figs. 99, 100. Optical section and a surface view of a spore seen from one side. G. 
