. Bulletin - United States National Museum. Science. 138 BULLETIN 77, UNITED STATES NATIONAL MUSEUM. narrow with subparallel margins and the longitudinal arrangement of the zocBcia predominates. The type species of the genus has a broad, palmate zoarium, but its internal structure is essentially the same as in the narrow, branched forms. The zooecial apertures in Padiydictya are oval and have well-marked, ring-like walls, this character alone being so marked that it serves as a distinction from other genera of the RMnidictyonidge. Genotype.—Padiydictya rohusta Ulrich. Middle Ordovician (Ot- to
. Bulletin - United States National Museum. Science. 138 BULLETIN 77, UNITED STATES NATIONAL MUSEUM. narrow with subparallel margins and the longitudinal arrangement of the zocBcia predominates. The type species of the genus has a broad, palmate zoarium, but its internal structure is essentially the same as in the narrow, branched forms. The zooecial apertures in Padiydictya are oval and have well-marked, ring-like walls, this character alone being so marked that it serves as a distinction from other genera of the RMnidictyonidge. Genotype.—Padiydictya rohusta Ulrich. Middle Ordovician (Ot- tosee) shales of east 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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