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| Fig. 76. | Oscillatoria labyrinthiformis. Br.: 0,00081; c. tube; b. green content with a square cavity a; d. division of the content in the tube. |
| Fig.„ 77. | Oscillatoria Okenii. a. the head; b. the tube; c. the content; d. the cavity found within it; thickness of the filament: 0,000325. |
| Fig.„ 78. | Oscillatoria interrupta. a. the head; b. the sheath; c. the content of a gall-colour; thickness: from 0,000045 to 0,00006. |
| Fig.„ 79. | Oscillatoria laminosa. a. the head; b. the sheath; c. the content; d. empty interval; thickness of the filament: 0,000265. |
| Fig.„ 80. | Oscillatoria vivida. Thickness: from 0,00010 to 0,0008. a. content with small oily drops; tube. |
| Fig.„ 81. | Oscillatoria punctata. The green content, with black spots; lives amongst the precedent ones; thickness: 0,000015. |
| Fig.„ 82. | Melotomus Fragilaria. a. member of the cuirass; b. brown content; breadth of a member: 0,00033. |
| Fig.„ 83. | Ophiothria sphaerocephalus. a. surrounding the Oscillatoria interrupta; b. the head; c. the neck; thickness of the filament: 0,0017. |
| Fig.„ 84. | The same, more magnified; d. tube; d. green content. |
| Fig.„ 85. | Sphaerodesmus bicolor. Thickness of members: 0,000251; a. green globular members; b. orange-coloured internodes. |
| Fig.„ 86. | 87. Sphaerodesmus depressus. Breadth of a member: 0,00018. a. transparent intermedial bladder; e. double members; b. transparent internodes. |
| Fig.„ 88. | 88. Sphaerodesmus spirillum. Thickness: 0,000281. Fig. 89, natural thickness; fig. 88. rolled filament. |
| Fig.„ 90. | Middle cell a. and filamentous members b. of the same animalcule. |
