. Bulletin - United States National Museum. Science. Fig. 113.—Leptotetpa hexagonalis. a, tangential section of the American type op the species, X20; THE LAEGER ZOOECIA FORM PART OF A MACULA, WHILE THE MORE NUMEROUS, SMALLER CELLS ARE OF THE ORDINARY INTERMACULAR KIND; &, SEVERAL ZOCECIA OF THE SAME SECTION, X30, SHOWING THEIR SEHPLiaTY OF STRUCTURE; C, VERTICAL SECTION, X20, EXHIBITING BOTH REGIONS OF THE THIN ZOARIAL LAYER. MIDDLE OEDOVICIAN (PLATTEVILLE) LIMESTONE, MlNEEAL POINT, WISCONSIN. zooBcia are wanting entirely in this area which undoubtedly repre- sents similar thickwalled, me
. Bulletin - United States National Museum. Science. Fig. 113.—Leptotetpa hexagonalis. a, tangential section of the American type op the species, X20; THE LAEGER ZOOECIA FORM PART OF A MACULA, WHILE THE MORE NUMEROUS, SMALLER CELLS ARE OF THE ORDINARY INTERMACULAR KIND; &, SEVERAL ZOCECIA OF THE SAME SECTION, X30, SHOWING THEIR SEHPLiaTY OF STRUCTURE; C, VERTICAL SECTION, X20, EXHIBITING BOTH REGIONS OF THE THIN ZOARIAL LAYER. MIDDLE OEDOVICIAN (PLATTEVILLE) LIMESTONE, MlNEEAL POINT, WISCONSIN. zooBcia are wanting entirely in this area which undoubtedly repre- sents similar thickwalled, mesopored areas at the base of the zoa- rium in such forms as Diplotrypa Mcornis. The subject of such areas of small cells is discussed on a previous page, where it is suggested. 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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