. Bulletin - United States National Museum. Science. Fig. 153.—ESTHONIOPORA COMMUNIS, a, TANGENTIAL SECTION, X20, SHOWING NORMAL ZOCECIA IN THE UPPER aVLF, AND THE SMALL, THICK-"WALLED, MESOPORELIKE CELLS IN THE LOWER PORTION; b, VER- TICAL SECTION OF THE SAME SPECIMEN, X20, WITH THE FREE ENDS OF THE DIAPHRAGMS BENT DOWNWARD; C, A ZOCECIAL TUBE OF THE SAME SECTION, X20, SHOWING FURTHER MODIFICATION OF THE DIAPHRAGMS; d, VERTICAL SECTION, X20, PASSING THROUGH A TRUE ZOCECIAL TUBE AND THROUGH TWO OF THE SMALLER CELL OPENINGS OF THE BASE. GLAUCONITE LIMESTONE (B2), REVAL, Please n
. Bulletin - United States National Museum. Science. Fig. 153.—ESTHONIOPORA COMMUNIS, a, TANGENTIAL SECTION, X20, SHOWING NORMAL ZOCECIA IN THE UPPER aVLF, AND THE SMALL, THICK-"WALLED, MESOPORELIKE CELLS IN THE LOWER PORTION; b, VER- TICAL SECTION OF THE SAME SPECIMEN, X20, WITH THE FREE ENDS OF THE DIAPHRAGMS BENT DOWNWARD; C, A ZOCECIAL TUBE OF THE SAME SECTION, X20, SHOWING FURTHER MODIFICATION OF THE DIAPHRAGMS; d, VERTICAL SECTION, X20, PASSING THROUGH A TRUE ZOCECIAL TUBE AND THROUGH TWO OF THE SMALLER CELL OPENINGS OF THE BASE. GLAUCONITE LIMESTONE (B2), REVAL, 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
