. Bulletin - United States National Museum. Science. Fig. 121.—Constellaeia vaeia. a, tangential section, X20, cutting several eays of a macula; b, veetical section, X20, passing theough a macula. Wassalem beds (D3), Uxnoem, Esthonla. themselves are higher than the spaces separating them. Zocecial apertures subcir- cular, inclosed by a very thin rim, and varying considerably in size, though approxi- mately equal on each fragment. Width of interspaces varying correspondingly, so. Please note that these images are extracted from scanned page images that may have been digitally enhanced for reada

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. Bulletin - United States National Museum. Science. Fig. 121.—Constellaeia vaeia. a, tangential section, X20, cutting several eays of a macula; b, veetical section, X20, passing theough a macula. Wassalem beds (D3), Uxnoem, Esthonla. themselves are higher than the spaces separating them. Zocecial apertures subcir- cular, inclosed by a very thin rim, and varying considerably in size, though approxi- mately equal on each fragment. Width of interspaces varying correspondingly, so. 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 United States National Museum; Smithsonian Institution; United States. Dept. of the Interior. Washington : Smithsonian Institution Press, [etc. ]; for sale by the Supt. of Docs. , U. S. Govt Print. Off.

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Keywords: ., bookauthorun, bookcentury1800, bookdecade1870, booksubjectscience