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Barby's gift was far more than a toy, and Rick promptly put it to work on a science project, in which he planned to compare the life cycles of two common microscopic animals, the paramecium and the rotifer.
Monactina. 75. Monads. 76. Naviculae. 77. Nitzschia. 78. Nostoc communis. 79. OEdogonium. 80. Oscillatoriaceae. 81. Ovaries of entomostraca. 82. Pandorina morum. 83. Paramecium aurelium. 84. Pediastrum boryanum. 85. " incisum. 86. " perforatum. 87. " pertusum. 88. " quadratum. 89. Pelomyxa. 90. Penium. 91. Peredinium candelabrum. 92. Peredinium cinc. 93. Pleurosigma angulatum. 94. Plumatella. 95.
But in the case of a close relative of the ameba, the one-celled animal known as the paramecium, union with another paramecium, true conjugation, has been proved necessary to prevent death sooner or later.
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