XIV LIST OF FIGURES 



35. Types of marine rhizopod shells -71 



36. Polythalamous shell types schematized 72 



37. A complex polythalamous shell 73 



38. Megalospheric and microspheric shells 74 



39. Clathrulina elegans . . . . . . . . . . . -75 



40. Types of spicules in Heliozoa 76 



41. Skeleton formation 77 



42. Lichnaspis giltochii 78 



43. Plagiocarpa procortina ............ 79 



44. Types of pseudopodia . . . . 80 



45. Camptonema nutans 8l 



46. Ciliophrys, pseudopodia and axial filaments 82 



47. Amoeba proteus pseudopodium, diagram 85 



48. Amoeba verrucosa, ectoplasm and vacuoles . . . . . . .85 



49. Contractile vacuole of Amoeba proteus 89 



50. Gromia oviformis 91 



51. Microgromia socialis in division 92 



52. Paramaba eilhardi ............ 94 



53. Spore-formation in Heliozoa 96 



54. Conjugation of Actinophrys sol 98 



55. Dimorpha nutans . . . . . . . . . . . . . 100 



56. Nuclearia delicatula . . . . . . . . . . . .102 



57. Protozoa with pseudopodia and flagella 103 



58. Membrane in Actinospharium eichhornii 104 



CHAPTER IV 



59. Proterospongia haeckeli . . ' ! 1 3 



60. Codonceca costata 114 



61. Dinobryon sertularia . . . . . . . . . . . .115 



62. Phacotus lenticularis . . . . . . . . . . . .116 



63. Distephanus speculum 117 



64. Gymnodinium ovum and Peridinium divergens 118 



65. Synura uvella . . . . . . . . . . . . . 119 



66. Primitive forms of Dipoflagellidia .......... 121 



67. Phalansterium digitatum 122 



68. Types of collars in Choanoflagellida 123 



69. A Choanoflagellate type 123 



70. Nuclear division in Noctiluca miliaris . . .124 



71. Megastoma entericum . . . '. . . . . . . .126 



72. Gonium pectorale . . . . . . . . . . . . .128 



73. Gonium pectorale in division 129 



74. Budding in Noctiluca miliaris 132 



75. Cercomonas crassicauda, division and spore-formation 133 



76. Pandorina morum, conjugation 134 



CHAPTER V 



77. Life history of a gregarine; schematic 141 



78. Pfeifferia tritonis in Triton cells 142 



79. Leptotheca agilis, a Myxospore 143 



