. Bulletins of American paleontology. North American Pleurocystitidae: Parsley 181 seems to be so protuberant. The sutures of these plates seem to be unusually straight and all of the known plates are somewhat atypical in outline and position. The outline drawing of this distal plate area (Text-fig. 6) is partly interpretation, due to inadequate preservation. The commonly paired radials "R4" and "R5" are fused into a single plate which, contrary to the general trend, is enlarged on this face, partly at the expense of "07". Plate Ol is abnormal in that it intercala
. Bulletins of American paleontology. North American Pleurocystitidae: Parsley 181 seems to be so protuberant. The sutures of these plates seem to be unusually straight and all of the known plates are somewhat atypical in outline and position. The outline drawing of this distal plate area (Text-fig. 6) is partly interpretation, due to inadequate preservation. The commonly paired radials "R4" and "R5" are fused into a single plate which, contrary to the general trend, is enlarged on this face, partly at the expense of "07". Plate Ol is abnormal in that it intercalates between LI and L4 instead of "07" which usually occupies this position. There is no evidence of the hydro- pore or gonopore between 01 and "07" or anywhere Text-fig. 6. — Plate outlines of the ventral distal plates of Pleurocystitcs bcckeri Foerste. The drawing is based on the holotype (PI. 27, fig. 7).. 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 Paleontological Research Institution (Ithaca, N. Y. ); Columbia University. Ithaca, N. Y. , Paleontological Research Institution [etc. ]
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