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| Fig. 54. | Echinella crenulata. Length without feet: 0,000115. |
| Fig.„ 55. | Two cells. a. mouth; b. b. lateral openings; c. c. square foot, common to both; d. d. brown content. |
PLATE V.
| Fig.„ 56. | Closterium Lunula Nitzsch; strongly magnified; breadth: 0,00316; length: 0,01735. |
| Fig.„ 57. | The same animalcule, still more magnified: a. mouth; b. rotatory bladder; c. intestinal tube; h. green content, with yellow oily drops; f. dented section; g. transversal band, transparent for want of the green content; d. d. the two lateral intermedial openings. |
| Fig.„ 58. | Point of a horn of the cuirass, strongly magnified; a. mouth; b. intestinal tube: c. rotatory bladder; d. dark corpuscules of this bladder. |
| Fig.„ 59. | Closterium acuminatum. Length: 0,00665. Perhaps the Closterium Leibleinii Kützing. (His drawing is too bad to ascertain it). Two united animalcules; a. the mouth; c. rotatory globules without bladder; e. intestinal tube and content; d. d. intermedial lateral holes; x. x. the same, by means of which both animalcules exchange their content; g. transveral bands. |
| Fig.„ 60. | The whole animalcule of the same species. |
| Fig.„ 61. | Closterium costatum. Thickness: 0,00147. A. A. Horns of the cuirass; b. b. mouth; a rotatory bladder; c. intermedial openings. |
| Fig.„ 62. | Edge of the cuirass valve, in the point of reunion of the two horns; d. its sides. 63. Point of the cuirass of the same animaleule; a. rotatory bladder; b. truncated extremity of the cuirass, as mouth; c. the rotatory globule in the bladder. |
