. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. REVISION OF LATE VALANGINIAN CEPHALOPODA 331. Fig. 181. Olcostephanus (Olcostephanus) quadriradiatus Imlay (?). The holotype from the Taraises Formation of northern Mexico (after Imlay 1938). x 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 South African Museum. Cape Town : The Museum

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Keywords: ., bookcentury1800, bookdecade1890, booksubjectnaturalhistory, booky