. Denkschriften - Ãsterreichische Akademie der Wissenschaften. Lendenfeld, R. v.: Skelettbildungen der Kieselschwämme. I. Taf. I. 17 26 18 - ⢠3 4 5 6 7 . â - * ' 10 20 21 22 23 r\ 18 29 30 31 32 9 10 11 12 13 14 15 16 33 34 35. vi ,,~V. 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 Akademie der Wissenschaften in Wien. Mathematisch-Naturwissenschaftliche Klasse. Wien, New York, Springer

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