M. Koidzumi 
309 
Figs. 39 and 40. Holomastigotes elongatum (?). 
Fig. 39. Whole organism. (4 x T ^.) 
Fig. 40. Another specimen, showing the endoplasm and spiral ridges (really dexiotropic, but 
focused on lower surface). (4 x T V) 
Figs. 41 and 42. Spirotrichonympha leidyi. 
Fig. 41. Semi-diagrammatic drawing of the organism. (4 x T \.) 
Fig. 42. Whole organism. (2x Jj.) 
Figs. 43-52. Holomastigotoides hartmanni. 
(In Figs. 43, 44, 45, 47, 48, and 51, the specimens are drawn focused on'lower surface, so 
that the spirals appear reversed (laeotropic). They are really dexiotropic.) 
Fig. 43. Whole organism. (2 x T \.) 
Figs. 44-46. Anterior portion. (4 x r V.) 
Figs. 47-51. Stages of division. (4 x r ^.) 
Fig. 52. Anterior portion of a young individual, soon after division. (4 x tV ) 
Fig. 53. Diagrammatic drawings showing structure of body wall of Teratonympha (a), Holo¬ 
mastigotoides (6), and Holomastigotes (c). 
PLATE XIV. 
Pyrsonympha. 
(In Figs. 54, 55 and 66, the specimens are focused on lower surface, scr that the spirals appear 
dexiotropic, though really laeotropic as in Fig. 65.) 
Figs. 54 and 55. P. grandis , whole organisms. (4 x T \.) 
Figs. 56 and 57. Anterior portion of P. grandis. (4 x^.) 
Figs. 58-61. Stages of division of P. grandis. (Figs. 58 and 60, 4 x T V; Figs. 59 and 61, 2 x T V) 
Figs. 62-64. Stages in degeneration of P. grandis. (4 x T V.) 
Figs. 65 and 66. P. modesta ; in the latter figure a screw-like form shown. (4 x T V) 
PLATE XV. 
Dinenympha. 
(In Figs. 68, 69, 71, 72, 79, and 81, the spirals are drawn reversely, the lower surface being 
focused. All spirals are really laeotropic.) 
Figs. 67, 68. D. exilis, whole organisms. (4x1^.) 
Figs. 69, 70. D. rugosa, whole organisms. (4 x fa.) 
Figs. 71 and 72. Middle portion of the body of D. rugosa, showing nuclei. More highly magnified. 
Figs. 73 and 74. D. nobilis, whole organisms. (4 x T \.) 
Fig. 75. Semi-diagrammatic drawing of the posterior portion of D. nobilis. 
Figs. 76 and 77. D. leidyi, whole organisms. (4x^.) 
Fig. 78. D. parva, whole organism. (4 x T \.) 
Fig. 79. D. porteri, type 1. (4 x X V) 
Fig. 80. D. porteri, type 2. (4 x rs-) 
Fig. 81. D. porteri, type 3. (4 x ^.) 
Fig. 82. Semi-diagrammatic drawing of the posterior end of D. porteri, type 1. 
Figs. 83 and 84. Stages of division of D. porteri. (4 x T V) 
