. Acta Academiae Scientiarum Imperialis Petropolitanae. 107- 115^ 123— 131 139. 49+ 82 (.121+ IO 81+ 58 147- 163 — 171 = 179- i87 =. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Imperatorskaia akademiia nauk i khudozhestv (Russia). Petropoli

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