. Diatomaceæ of North America, illustrated with twenty-three hundred figures from the author's drawings on one hundred and twelve plates. Fragilariaceae. Plate XIII. 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 Wolle, Francis, 1817-1893. Bethlehem, Pa. , The Comenius Press

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Keywords: ., bookcentury1800, bookdecade1890, booksubjectfragila, bookyear1890