. Allan Hancock Pacific expeditions. [Reports]. Scientific expeditions. ALLAN HANCOCK PACIFIC EXPEDITIONS VOLUME 2 NUMBER 11 A REMARKABLE NEW GENUS OF SEA-URCHIN (Spatangidae) (Plate 17) by HUBERT LYMAN CLARK. 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 Allan Hancock Foundation. Los Angeles, University of Southern California Press

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