. Bulletins of American paleontology. NATICIHAE POLIMICINAE .SPIRAL COSTAE UMBILICUS. ^ININAE CARINATION UMBILICAL 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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